Mathematics College

22 POINTS ( LOTS OF POINTS) A student answered 81 problems on a test correctly and received a grade 90%.
How many problems were on the test, if all the problems were worth the same
number of points?

Answers

Answer 1

I think 88 problems were on the test.

Answer 2
81 = .9
divide 81 by 9 and you get 9 points for every 10%
since we need to find the last 10%, add 9 to 81 and you get that 90 problems were on the test :) hope this helps

Related Questions

Write equations in slope-intercept form for three different lines that intersect at (-2,3).

Answers

Answer:

y = 3/2x + 6

y = -1/4x + 5/2

y = -x + 1

Step-by-step explanation:

I used the point (-2, 3) with a variety of slopes (3/2, -1/4, -1) and plugged the point and slope into y=mx+b to get 'b' (the y-intercept).

anyone up that can help me ​

Answers

Answer:

Step-by-step explanation:

reflection

Complete the number sentence.

0.30 ÷ 0.06

Answers

Answer:

5

Step-by-step explanation:

Answer:

0.30 ÷ 0.06 = 5

Step-by-step explanation:

help me pleaseeeeee​

Answers

Answer:

the 4th one, 5 7/9

Step-by-step explanation:

Answer:

–5 7/9

Step-by-step explanation:

Follow my account ^^

which ordered pair is the solution set of -6x+2y>6

Answers

Answer:

C-(-3,4)

Step-by-step explanation:

PART 2
HELPPPPPPPPPPPPPPPPPPPPPPPPPP

Answers

Answer:

54 hours

Step-by-step explanation:

So, first of all subtract the money she has from the total amount.

540-60=480 She still needs $480. So divide this number by the amount she gets in an hour. (9)

480/9 =53.33333 since she can't work half hours, i rounded up.

Helppppppppppp plzzz ​

Answers

Answer:

4

Step-by-step explanation:

hope this helps......

The length of the base of an isosceles triangle is x. The length of a leg is 3x - 4. The perimeter of the triangle is 76. Find x.
X=

Answers

Answer:

12

Step-by-step explanation:

Hi!

We're given that the perimeter is 76. A triangle's perimeter is given by the sum of all of the sides. So, we'll find the lengths of the sides of the triangle and add them.

This is an isosceles triangle. The legs of an isosceles triangle are equal. In this problem, we're given the length of one leg: 3x-4. That means that the length of the other leg is also 3x-4. Now, the last side of the triangle is x ("base is x).

2(3x-4) + x = 76

6x-8+x=76

7x-8=76

7x=84

x=12

Let's check our answer.

3(12) - 4 =36-4 = 32

32 times 2 = 64 +12 =76

Correct!

Which shows two possible values for a number represented by the point?

A number line going from 0 to 1. There are 4 equal spaces between 0 and 1. A point is half-way between 0 and 1.
StartFraction 2 Over 4 EndFraction and One-third
StartFraction 2 Over 4 EndFraction and One-half
2 and StartFraction 2 Over 4 EndFraction
2 and One-half pls help im timed

Answers

Answer:

B-2/4 and 1/2

Step-by-step explanation:

Answer:

b

Step-by-step explanation:

There are 5 quarts left in the fridge. How many liters are in the fridge? (1 quart = 0.946 liters).

Answers

0.946 x 5 = 4.73 litres

9 by the power of 2 x 2-4 by the power of 2

I AM IN THE NEED OF HELP ASAP THIS QUESTION IVE BEEN STUCK ON THIS ONE FOR HOURS!!!!

Answers

Answer:

1

Step-by-step explanation:

The shortest route from London to York is 200 miles.
A lorry is expected to take 4 hours to travel this route.
The lorry actually travels by a different route which increases the distance by 20%, but it still arrives in 4 hours.
By how many more mph than the expected speed does the lorry travel?

Answers

Answer: The lorry is traveling 10 mph over the expected speed.

Step-by-step explanation:

If 200 miles takes 4 hours, the speed is 200mi/4hr which  is 50 mph.

If the distance is increased by 20%, the distance is 240 miles.

240mi/4hr = 60mph

The difference is 10mph

Find the value of x​

Answers

Answer:

x=39 degrees

Step-by-step explanation:

x + 31 equals 2x - 8 because both pair of expressions must add up to 180

Does anyone know the answer?

Answers

a. True
b. True
c. False
d. True
e. True
f. True
g. False
h. False
i. False
j. False
k. (I can’t see the whole picture)
l. ( same with this one)

please help meeee the blue line is what I have to find please show your work​

Answers

Answer:

So we have to satisfy the equation so let us simplifyLet the empty space be n N-16+4n+9+1= 10n-6 N-4n=10nn=14n So the missing value is 14N to statify the equation
Let the blue line equal to n

So now the equation is n-16+4n+10=10n-6

Collect like terms

5n-6= 10n-6

Move 6 to the other side as a positive

5n=10n

Move 10n to the other side as a negative

5n-10n=0

-5n=0

Divide both sides by -5

So, n is equal to 0


The sum of two numbers is negative thirty-two. One number is two less than the other.



Call the numbers m and n.

Answers

Answer:

-15 and -17

Step-by-step explanation:

predict whether the product is greater than, less than, or equal to 7/10. What is the product? 10/10 x 7/ 10

Answers

Answer:

7/10 *10/10 is 70/100 or 7/10 so equal

Step-by-step explanation:

the product is 7/10.

it is 10/10which simplifies to 1(divide by 10)

so it wouldn't change

Hope this helsp zpl hit hte crown :D

Suppose that a population parameter is 0.3 and many samples are taken from the population. If the size of each sample is 40, what is the standard error of the distribution of sample proportions?

A. 0.095
B. 0.055
C. 0.072
D. 0.032

Answers

Answer:

0.072

Step-by-step explanation:

A P E X

Mr. kim travels 32 weeks a year for work. He is home the other 20 weeks. There are 7 days in a week. Which of the following basic facts can Mr. Kim use to help find the number of days he is home.
A. 2x7
B. 3x7
C. 32+7
D. 20+7​

Answers

Answer:20 * 7 (20 times/ multiplied by 7)

Step-by-step explanation: home is 20weeks with 7 days each. So, 20 times 7

In other words

Count seven days 20 times

x-axis =____
y-axis =____
y= x ____
y= -x____​

Answers

Answer:

x-axis = (2, -3)

y-axis = (-2, 3)

y = x (3, 2)

y= -x (-3, -2)

Step-by-step explanation:

x-axis = (2, -3) The point is below the x-axis.

y-axis = (-2, 3)  The point is left of the y-axis

y = x (3, 2) Plot the line y = x. The point is on the other side of the line.

y= -x (-3, -2) Plot the line y = -x. The point is on the other side of the line.

Here are the monthly charges for Jo's mobile phone
Monthly charge 616
150 free minutes, then 18p per minute
150 free texte, then 18p per text
During one month, Jo makes 170 minutes of calls and sends 182 texte,
Work out the total charge for the month

Answers

Answer:

The correct answer is - 625.36.

Step-by-step explanation:

Given:

Fixed mothly plan - 616

free minutes - 150

Used minutes - 170

Free text - 150

Used text - 182

Charging amount over free limit - 18p

Solution:

Number of minutes over the limit -  170 - 150 = 20

Number of text over the limit - 182 - 150 = 32

So the extra amount that will be add to the monthly charge would be -

(20*0.18) +(32*0.18)

and the total charge of the month would be -

= 616+(20*0.18) +(32*0.18)

= 616+3.60+5.76

= 625.36

Thus, the correct answer would be - 625.36

A teacher administers a standardized math test to his class of 75 students. The mean score (out of 300 possible points) is 235. From previous studies, you know the population standard deviation is 28. Using the sample data given, calculate a 95% confidence interval for the population mean.

Answers

Answer:

(228.663 ; 241.337)

Step-by-step explanation:

Given that:

Mean (m) = 235

Standard deviation (s) = 28

α = 95%

Zcritical at 95% = 1.96

Sample size (n) = 75

The confidence interval of the population mean can be obtained using the relation :

Mean ± Error

Error = Zcritical * (s/sqrt(n))

Error = 1.96 * (28/sqrt(75))

Error = 1.96 * 3.2331615

Error = 6.33699654

Error = 6.337

Lower boundary = 235 - 6.337 = 228.663

Upper boundary = 235 + 6.337 = 241.337

(228.663 ; 241.337)

PLEASE HELP EASY MATH PLEASE ASAP
What is the Ax + By =C form (where A > 0, and A, B, and C are integers with
factors) of the equation of the line that passes through (-4,9) with a slope of -3/2

Answers

Answer:

Step-by-step explanation:

I don't really know what your question is asking for but I can tell you there's a quadratic formula that solves for x-ints. There's a quadratic equation which is Ax + bx + c = 0.

What is the probability of picking a purple marble and spinning green?


Answers

two out of how many there is.

17 divided by 1/3 pls help me

Answers

Answer:

51

Step-by-step explanation:

just the denominator with the numerator

(0.5x - 0.6) + (0.75x - 0.1)

Answers

The answer is 0.05(25x-14) = fraction form 1/20 •(25x-14)

Answer:

1.25x-0.7

Step-by-step explanation:

0.5x−0.6+0.75x−0.1

=0.5x+−0.6+0.75x+−0.1 Combine Like Terms:

=0.5x+−0.6+0.75x+−0.1

=(0.5x+0.75x)+(−0.6+−0.1)

=1.25x+−0.7

Answer:

=1.25x−0.7

In tuv y is centroid if yw=5b and ty=4b+14 find tw

Answers

your right Step-by-step explanation:

The measure of TW from the given triangle TUV is 35 units.

What is centroid of a triangle?

The point in which the three medians of the triangle intersect is known as the centroid of a triangle. It is also defined as the point of intersection of all the three medians.

Given that, in triangle TUV, Y is centroid if YW=5b and TY=4b+14.

The centroid is positioned inside a triangle. At the point of intersection (centroid), each median in a triangle is divided in the ratio of 2:1.

Now, TY/YW =2/1

(4b+14)/5b =2/1

10b=4b+14

6b=14

b=14/6

b=7/3

Now, TW=YW+TY

TW=5b+4b+14

TW=9b+14

Substitute, b=7/3 in TW=9b+14, we get

TW=9×7/3+14

= 21+14

= 35

Therefore, the measure of TW is 35 units.

Learn more about the centroid here:

brainly.com/question/10708357.

#SPJ2

Help anyone I’ll appreciate it thank you

Answers

Answer:

150

Step-by-step explanation:

the total angle of a flat line is 180

since one side is 30 180-30 is 150

Please help with all three

Answers

Answer:

1)1/3 x3=9

2)The didvsion equation is the smae because you would get the same answer.

3) it would be 9

Step-by-step explanation:

Translate the sentence into an inequality.
A number c increased by 3 is greater than -27.

Answers

Answer:

Inequality: c + 3 > -27

Other Questions
2.ANSWERR CORRECT FOR BRAINIEST A form of argument in which the opinionof a celebrity or popular/wel-knownindividual on a topic is used as evidenceto support an argument. Katie is purchasing plates and mugs for her house.She would like to buy at least 8 items. Plates cost$8 each and the mugs cost $7 each, and she plansto spend no more than $112. Write a system tomodel the situation and then solve. The percentage of money a credit card company charges customers who pay beck loans over time is called O A the credit score. O B. the minimum monthly payment O c. the credit limit O D. the interest rate. 80 middle-school students went on a field trip to watch a performance of Alice In Wonderland. When the teacher took a survey, 70% of the students responded that they enjoyed the play. About how many students enjoyed the play? Which ordered pair is a solution of this equation? -6x + y = 35 Click on the correct answer. (-1,-7 (-6,-1) (-1,-6) (-7,-1) According to the Preamble to the Constitution, what is one purpose ofgovernment? Evaluate the polynomial for the given value of x.- 4x5 - 5x4 3x3 - x? for x = -2A. 97B. 68C. 64D. 63 You are the manager of a bank. You need to decide whether to approve a 10-year loan application from a 25 year old student to finance her MBA. The loan will yield a loss of $250 per year to the bank for the duration of the loan. After 10 years, the student will likely buy other products and therefore she will yield a profit of $500 per year until she is 65. After age 65, she will yield a profit of $1,000 per year until she is 85, when she will stop being a customer. The likelihood that she stops being a customer after she repays her MBA loan is 2% each year. The discount rate that the bank uses is 7% per year.Would you approve the loan? Please explain with numerical support. A train covers the distance between two cities A and B at 70km/h during certain time. If it goes 10km/h faster, it will cover the same distance in one hour less. Find the distance between the two cities and the time it takes to do the first trip if x = 1/2 when y = 36 what id x when y = 144 Which of the following describes a correct method for solving the equation: -7/2n + 5= -16 A. Add 5 to both sides, then devide both sides by 2/7. B. Subtract 5 from both sides, then add 7/2 to both sides. C. Add -5 to both sides, then multiply both sides by -2/7. D. Subtract 5 from both sides , then multiply both sides by 7 Which act requires financial institutions to explain To customers how they gather information with whom they share it and what measures they take to safeguard it The length of the base of an isosceles triangle is x. The length of a leg is 3x- 7. The perimeter of the triangle is 63. Find x. *20221112 7(12b + 9) - b what is the awnser WILL GIVE BRAINLY!!!When it is fall in the Northern Hemisphere, what is the season in the Southern Hemisphere?fallwinterspringsummer On a unit circle, the vertical distance from the x-axis to a point on the perimeter of the circle is twice the horizontal distance from the y-axis to the same point. What is sin of theta What did Operation Bootstrap" mean for Puerto Rico? Why do atoms become larger as you move down a group?O The numbers of energy levels increase.O Electron shielding increases.O The decrease in ionization energy.O The mass of the atom increases. PLEASE HELP!!!!!!!What has to be true if you want to solve a quadratic?