solve this system using elimination. 3x - 4y = -5, -10x + 4 = 12

Answers

Answer 1

Answer:

x = -4/5, y = 13/20

Step-by-step explanation:

-10x + 4 = 12

-10x = 8

x = -4/5

3x - 4y = -5

3(-4/5) - 4y = -5

-12/5 - 4y = -5

-4y = -13/5

y = 13/20

Double check:

3x - 4y = -5

3(-4/5) - 4(13/20) = -5

-12/5 - 13 = -5 (true)


Related Questions

Y multiplied by 2 1/2

Answers

Answer:

a-2 / a - 1

Step-by-step explanation:

Answer: 2 1/2y

Step-by-step explanation:

This is correct because y is not a number it is a variable. This is y get it. That this is correct. Hope this helps ;)

Select all the ratios that are equivalent to 8 : 6. *

4:3
6 to 8
16:12
10:8
7 to 5

Answers

Answer:

4:3 and 16:12

Step-by-step explanation:

Consider a 95 percent confidence interval constructed for the difference between two population
proportions PR and Ps. The interval for PR - Ps is given as (-0.05, 0.15). Which of the following is an
appropriate interpretation of the confidence level?
In repeated random sampling with the same sample size, êr - Ộs will be contained in
the interval approximately 95 percent of the time.
In repeated random sampling with the same sample size, PR will be contained in the
interval approximately 95 percent of the time.
In repeated random sampling with the same sample size, Ôr will be contained in the
interval approximately 95 percent of the time.
The probability is 0.95 that the difference in the sample proportions PR - Ổs is between
-0.05 and 0.15
In repeated random sampling with the same sample size, approximately 95 percent of the
intervals will capture the difference in population proportions, PR - Ps.

Answers

Answer:

E

Step-by-step explanation:

In repeated random sampling with the same sample size, approximately 95 percent of the intervals will capture the difference in population proportions, PR - Ps.

help i need help on this​

Answers

Answer:

27

Step-by-step explanation:

im almost possitive that that is right

Answer:

C. 27 [tex]cm^{2}[/tex]

Step-by-step explanation:

For this problem find the area for the three individual segment then add them together.

Step 1: Find area of the rectangle

formula for area of a rectangle: bxh

b-base

h-height

3x6=18

Step #2: Find area of the triangle

Formula for area of a triangle:[tex]\frac{1}{2} bxh[/tex]

b-base

h-height

[tex]\frac{1}{2} (3x3)[/tex]=1/2(9)=4.5

Step #3: Find the area of the triangles total

Because the two triangles have the same area you can just multiply the area of one of the triangles by 2

4.5x2=9

Step #4: Add all the areas together

rectangle+2 triangles

18+9=27

The results of a magazine survey showed that 42 out of 80 people plan to vote for Mr. Smith for President. Which is the best prediction of the total number of votes he will receive if 2,000 people vote?

A.
25

B.
50

C.
120

D.
1,050

Answers

I think it will be c

find the x (please help lol)

Answers

Answer:

x = 23.5

Step-by-step explanation:

x is the midsegment theorem of the trapezoid given.

Based on the midsegment theorem of a trapezoid, thus:

x = (7 + 40)/2

x = 47/2

x = 23.5

#17. The height, H metres, of a certain species of Fir
tree can be estimated from the formula.
h= 35d , where d metres is the diameter at the
base. use the formula to determine the approximate
height of a fir tree with base diameter 3.2 m.

Answers

Answer:

The approximated height of the tree is of 112 meters.

Step-by-step explanation:

The height of a tree with a base diameter of d meters is approximated by the following formula:

[tex]h = 35d[/tex]

In this question:

Base diameter of 3.2m, so [tex]d = 3.2[/tex], and the height is in meters.

[tex]h = 35d = 35(3.2) = 112[/tex]

The approximated height of the tree is of 112 meters.

Answer:

The answer actually is 76m

Step-by-step explanation:

A cylinder is sliced horizontally, parallel
to its base, and vertically. Which of
the following could represent cross
sections of the cylinder?
Circle and triangle
Circle and rectangle
Circle and hexagon
Circle and sphere

Answers

Answer:

Rectangle

Step-by-step explanation:

Plsssss help plssss ASAP plssss I beg u plsssssssssssssssssssss it’s so hard :((((
Which situation is a true statement about payment options?

CLEAR CHECK

A) An advantage of online banking is that you do not need to keep detailed records when paying bills.

B) Paying with a credit card means the amount you spend will be deducted from your checking account.

C) Keeping track of your debit card transactions will help avoid charges resulting from insufficient funds.

D) To avoid paying interest on your credit card purchases, pay only part of your balance each month.

Answers

Answer:

c

Step-by-step explanation:

A 440-yard race had ten athletes which ran for the following times (in seconds): 46.9, 48.9, 46.7, 46.2, 46.5, 47.2,47.5,46.1, 48.9, and 46.4 . What is the mean of the three fastest runners?

Answers

Answer:

47.13

Step-by-step explanation:

add all the numbers together

divide by how many there are

Find the x and y intercepts Y-2xy+4x=1

Answers

Answer:

[tex]x = \frac{1}{4}[/tex]

[tex]y= 1[/tex]

Step-by-step explanation:

Given

[tex]y - 2xy + 4x = 1[/tex]

Solving (a) The x intercept

Let y = 0

[tex]y - 2xy + 4x = 1[/tex]

[tex]0 - 2x*0 + 4x = 1[/tex]

[tex]0 - 0 + 4 x = 1[/tex]

[tex]4x = 1[/tex]

Divide both sides by 4

[tex]x = \frac{1}{4}[/tex]

Let x = 0

[tex]y - 2xy + 4x = 1[/tex]

[tex]y - 2y * 0 + 4*0 = 1[/tex]

[tex]y - 0 + 0 = 1\\[/tex]

[tex]y= 1[/tex]

9.Patients who are addicted to cocaine are sometimes using the drug to combat
depression. As such, sometimes addicts are given antidepressant medications to
prevent relapse. A three-year study compared the effects of two such medications,
lithium and desipramine, along with a placebo for 72 cocaine users wishing to break
the habit. The patients were put into 3 groups of 24, and given 1 of the 3 treatments at
random. This two-way table illustrates the results.
Treatment Relapse No relapse Total
Desipramine 10 14 24
Lithium 18 6 24
Placebo 20 4 24
Total 48 24 72
According to the table, 48 of the addicts relapsed regardless of the treatment given.
This number is an example of a
A. relative frequency
B. marginal frequency.
C. conditional relative frequency.
D. joint frequency

Answers

I did this but I got 18/24 option c ?
Sorry if I’m wrong

use the bar diagram to help you solve the equation 4x-12=16.

Answers

Answer:

x = 7

Step-by-step explanation:

4x−12=16

Step 1: Add 12 to both sides.

4x−12+12=16+12

4x=28

Step 2: Divide both sides by 4.

4x/4 = 28/4 = 7

x=7

What is the range of the data below? 6.5, 7.6, 9.1, 2.4, 8.8​

Answers

The range is 6.7
To find the range you find the difference of the highest and lowest number

I need help please please help

Answers

Answer:

i think 6 or 8

Step-by-step explanation:

Write an equation for the function whose graph is described.
The shape of f(x) = |x|, but shifted 19 units up and then reflected in the x-axis

Answers

Answer:

f(x)=-|x|+19

Step-by-step explanation:

so shifted 19 units up means

abosolute value of x + 19

and reflected in the x axis means that you have to put the - before the abosolute value.

so -|x|+19

Jessica has an account with a credit union. Her account earns 2.6% simple interest yearly. Exactly a year and a half ago, she opened her account with $900.

How much interest has she earned so far?
A.
$35.10
B.
$2,340.00
C.
$46.80
D.
$28.08
pls someone help im very confused

Answers

Answer:

Good Luck!

Step-by-step explanation:

D

PLEASE HELP WILL GIVE LOTS OF POINTS & BRAINLY!!

Answers

Answer:

the amplitude is 5

the period is 4 pi

Step-by-step explanation:

130 3x + 67 degrees
please please please please please please please help​

Answers

Answer:

x=21

Step-by-step explanation:

Since the angle is the same size it is equal to 130 degrees.

subtract 67 from both sides and then dived by 3x and that gets you x=21

what is 4 divided by 3/4?

Answers

Answer:

16/3 or 5.33

Step-by-step explanation:

Cross multiply

4/1 * 3/4

4 * 4 = 16

3 * 1 = 3

5) A book is sold at $152.50 and a discount of 9% is given for students.
Find the cost of the book.
13

Answers

Answer:

$138.78

Step-by-step explanation:

152.50 decrease 9% =

152.50 × (1 - 9%) = 152.50 × (1 - 0.09) = 138.775

library 3.5x250
[tex]3.5 \times 500 = [/tex]

Answers

Answer : 3.5x250=875

Decrease £313 by 62%

Answers

Answer:

194.06

Step-by-step explanation:

313×0.62=194.06

-8h+z/7
Use z=21 and h=4

Answers

Answer:

Hope this helps

Step-by-step explanation:

Using the equation 2 + 3/41 = 5, what does the value of I equal?

Answers

Answer:

i did't see the value I in the equation

Step-by-step explanation:

Please help me answer this!!!

Answers

Answer:

the process of being a differential is that the process of moving to the different people in a very good process of being the speaker of speaker and the senate speaker and the author organizes a different speech to the topic and i  

Step-by-step explanation:

the process is important as the speaker of speaker is the process of speech to a speech in speech speech and speech in speech and speech

Shannon drank 1/5 cup of milk
and 3/4 cup of water. How much
did she drink altogether?
Answer


Answers

Answer:

does it have to be simpilfied? if not:   19/20

Step-by-step explanation:

Question is in the Picutre attached.

Answers

Bisectors make two congruent segments. Thus, set the two expressions equal to each other. Solve for x. Then plug back in to the expression for QP. I have attached the work to clarify. Hope it helps!

suzette went to the store and bought some eye liner for $2.50. two weeks later, the price of the eyeliner was increased by 50%. what was the new price of the eyeliner

Answers

Answer:

$5.00

Step-by-step explanation:

Since the eyeliner went up and doubled in price, you simply multiply 2.50 by 2, and you get $5.00


If it is equal to (or) greater than 5, add__ to previous digit
(a)1
(b)0
(c)10​

Answers

Answer:

(b) 0 is the answer.....

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