Upvote
•
1
Downvote
Add commeAnswer:
y = -4x
When x = 4, y = -16
When y = 20, x = -5
Step-by-step explanation:
First off, definitions: Direct variations refers to two variables being related with neither being the denominator of a fraction. (nothing along the lines of y = 1/x)
So, given that, I simply found what the ratio was between the two values. Something like buying gas at the gas station. The ratio between the gas you get and the money you pay is the price per gallon of gas. In this case, the proportion is -4 (-16 divided by 4).
Thus we have a relationship. For each y, you have negative four x's. Thus, y = -4x.
Finding the value of x when y = 20 simply requires plugging values in. Remember, a fundamental principle in all of Algebra is substitution. If two things are equal, they are interchangeable. So, if you saw "3 + 4" in a mathematical expression, you could simply erase it and write 7, so long as no other mathematical rules (multiplication before addition, for instance) interferes.
Thus, if y = 20, we can take our original equation and replace y with 20.
y = -4x => 20 = -4x
Then, simply solve for x, keeping in mind that when two items in math are written against each other, it means multiplication. Thus, we reverse the multiplication to division and divide both sides of the equation by -4.
20 / -4 = -5
Answer:8
Step-by-step explanation:16
i need this now asap
A scientist measures the growth of a new type of ivy that has been bred to grow in all types of weather. At the end of each week, the scientist measures the length of the vine.
A 3-column table with 5 rows. Column 1 is labeled Weeks with entries 1, 2, 3, 4, 5. Column 2 is labeled Total length (inches) with entries 4, 8, 12, blank, blank. Column 3 is labeled Total length (feet) with entries blank, blank, 1, blank, blank.
If the vine continues to grow at this rate, it will be
inches long at the end of 5 weeks. and the answera is 20
Answer:
16, then 20 inches
Step-by-step explanation:
Which data set does this stem-and-leaf plot represent? Stem | Leaf
------------------
1 | 55889
2 | 0
3 | 0339
4 | 15
A. 30, 39, 33, 15, 15, 18, 20, 33, 19, 41, 45, 18
B. 39, 33, 15, 18, 18, 20, 3, 19, 41, 45, 18
C. 15, 19, 19, 20, 30, 33, 39, 41, 45
D. 5, 5, 8, 8, 9, 0, 0, 3, 3, 9, 1, 5
Answer:
D
Step-by-step explanation:
You have to find a pattern that correlates to one of the options to get the key of the stem and leaf diagram. The pattern is the stem is multiplied by the leaf.
In the first one:
1*5=5
1*5=5
1*8=8
1*8=8
1*9=9
And so on
Every 14 days, Debbie’s dog eats 4 1/5 pounds of dog food. If Debbie’s dog eats the same amount of food each day, how many pounds does her dog eat per day?
The amount of food her dog eat per day would be; 0.33 pound.
What is the unitary method?The unitary method is a method for solving a problem by the first value of a single unit and then finding the value by multiplying the single value.
Given that Debbie’s dog eats 21/5 pounds of dog food every 14 days. Debbie’s dog eats the same amount of food each day.
Therefore,
21/5 pounds of dog food = 14 day
one day = 14 / (21/5 ) pounds of dog food
One day = 14 x 5/ 21
= 10/3
Therefore, the amount of food her dog eat per day would be; 0.33 pound.
To learn more about the unitary method, please visit the link given below;
https://brainly.com/question/23423168
#SPJ2
A soccer field is 120 yards long. *1 yard = 3 feet
Han measures the length of the field using a 30-foot-long tape measure and gets a measurement of 358 feet, 10 inches.
What is the amount of the error?
Express the error as a percentage of the actual length of the field.
Answer:
0.33
Step-by-step explanation:
Brainlest please :D
What statement describes how water is involved in weathering a rock?
It increases the volume of the rock.
It makes the edges of the rock jagged.
It makes the edges of the rock smooth.
It moves the rock to a new location.
What is the distance between (-8, 5) and (6, 5)?
Enter your answer in the box.
___ Units
Answer:
distance: 14
explanation:
[tex]\sf \sqrt{(y_2-y_1)^2+(x_2-x_1)^2}[/tex]
given:
(-8, 5) and (6, 5)solve:
[tex]\sf \rightarrow \sqrt{(5-5)^2+(6--8)^2}[/tex]
[tex]\sf \rightarrow \sqrt{(0)^2+(14)^2}[/tex]
[tex]\sf \rightarrow \sqrt{14^2}[/tex]
[tex]\sf \rightarrow 14[/tex]
Solution:
We know that:
[tex]\text{Distance }=\sqrt{(x_2-x_1)^{2} +(y_2-y_1)^{2}}[/tex]
Finding the coordinates
(x₁,y₁) = (-8,5) = x₁ = -8; y₁ = 5(x₂,y₂) = (6,5) = x₂ = 6; y₂ = 5Substitute the coordinates into the distance formula.
[tex]\text{Distance }=\sqrt{(x_2-x_1)^{2} +(y_2-y_1)^{2}}[/tex]
[tex]\rightarrow \text{Distance }=\sqrt{[(6- (-8)]^{2} +[5-5]^{2}}[/tex]
[tex]\rightarrow \text{Distance }=\sqrt{[(6 + 8]^{2} +[0]^{2}}[/tex]
[tex]\rightarrow \text{Distance }=\sqrt{[14]^{2}[/tex]
[tex]\rightarrow \boxed{\text{Distance }=14 \ \text{units}}[/tex]
PLS!! HELP ASAP I WILL GIVE BRAINLIEST. write the correct answer
pic is not blurry not excuses
Answer:
8 or 9
Step-by-step explanation:
im not sure hope this helps
i made this line graph by measuring a cardboard box yesterday. can someone write 2-3 sentences about what you understood from this graph?
will give brainliest!
Answer:
As the time went by the shadow got smaller untill it hit three pm and 4pm. The reason the box shadow did not change over the time period of 4pm and 7pm is because at night there is no chance of light hitting around the box because from this graph I can see that the sun was goung down by 3pm. In conclusion the graph below shows when the sun was up and when the sun went down.
Step-by-step explanation:
As the time went by the shadow got smaller untill it hit three pm and 4pm. The reason the box shadow did not change over the time period of 4pm and 7pm is because at night there is no chance of light hitting around the box because from this graph I can see that the sun was goung down by 3pm. In conclusion the graph below shows when the sun was up and when the sun went down.
someone help me with this i’ll mark u brainlist or whatever its called lol
HELP PLS APASAPA I WILL GIVE BRAIN
Answer:
you answer will be a binary number
Solve for the indicated variable.
[tex]\frac{g}{h} = e - 10[/tex] for g
Answer:
g = h(e-10)
Step-by-step explanation:
You can multiply the whole equation by h to get g by itself.
PLEASE DONT PUT ANYTHING IF U DONT KNOW IF U DO WELL PUT IT cuz it makes it look like if was answer PLS HELP ME OUT 6th grade math
Answer:
what is the question
Step-by-step explanation:
helpppppppppppppp!!!!!!!!!!
∠A and ∠B are complementary. The measure of ∠A is 75°.
What is the measure of ∠B?
Enter your answer in the box.
Answer:
15 is the measure of B
Step-by-step explanation:
Complementary angles have a sum of 90 degrees
A trampoline is shaped like a circle. The radius of the trampoline is 4 feet. Around the edge of the trampoline is 0.75 foot wide padded cover over the springs. This pad looks like a ring around the edge of the trampoline.
What is the probability of a student landing on the padded cover over the trampoline springs?
Enter the answer, rounded to the nearest hundredth, in the boxes.
Probability landing on the padded cover over trampoline springs =
Answer:
its 0.29
Step-by-step explanation:i took the test
Sarah can spend at most $200 on school clothes write an inequality to represent the amount Sarah can spend on school clothes. Use UPS Check.
Answer:
x ≤ 200
Step-by-step explanation:
Let x = the amount Sarah can spend on school clothes
Given:
Sarah can spend at most $200⇒ x ≤ 200
≤ means equal to or less than
What is the slope of the line?
Answer:
In mathematics, the slope or gradient of a line is a number that describes both the direction and the steepness of the line. Slope is often denoted by the letter m; there is no clear answer to the question why the letter m is used for slope, but its earliest use in English appears in O'Brien (1844) who wrote the equation of a straight line as "y = mx + b" and it can also be found in Tod hunter (1888) who wrote it as "y = mx + c".
Step-by-step explanation:
Steps for Graphing a Line With a Given Slope
Plot a point on the y-axis. (In the next lesson, Graphing with Slope Intercept Form, you will learn the exact point that needs to be plotted first. For right now, we are only focusing on slope.)Look at the numerator of the slope. Count the rise from the point that you plotted. If the slope is positive, count up and if the slope is negative, count down.
Look at the denominator of the slope. Count the run to the right.
Plot your point.
Repeat the above steps from your second point to plot a third point if you wish.
Draw a straight line through your points.
Answer: as you can see the line only on the 1
Step-by-step explanation:
If you are given two unknown samples of gray metals, how can you use physical properties to determine if they are the same?
he tables show the numbers of white and yellow flowers Cara and Hector used in 5 different arrangements.
Cara’s Flower Arrangements
White 3 6 9 12 15
Yellow 5 10 15 20 25
Hector’s Flower Arrangements
White 4 8 12 16 20
Yellow 6 10 14 18 22
Part A
Are the numbers of white and yellow flowers in Cara’s arrangements proportional?
Which equation relates the number of white flowers, w, to the number of yellow flowers, y?
Yes; y=35w
Yes; y=53w
No; y=3w+5w
No; y=5+3w
Part B
Are the numbers of white and yellow flowers in Hector’s arrangements proportional?
Which equation relates the number of white flowers, h, to the number of yellow flowers, e?
Yes; e=32h
Yes; e=23h
No; e=h+2
No; e=h−2
Answer:
A.
1. no, y = 5 + 3w
B.
no, e = h + 2
Step-by-step explanation:
Using the principle of proportional relationship to model the two tables, we can infer that, the first first table is proportional while the second isn't.
Clara's arrangement :
White (w)Yellow (y)Testing if relationship is proportional :
y = kw5 = 3k
[tex] k = \frac{5}{3}[/tex]
Yes, the relationship is proportional [tex] y = \frac{5}{3}w[/tex]
Hector's arrangement :
White (h)Yellow (e)The number of yellow flowers surpasses the number of white flowers by a constant value of 2.
Hence, the relationship can be modeled thus ;
e = h + 2Therefore, the relationship is not proportional.
Learn more : https://brainly.com/question/19267918
About 3.9 x 10^7 people live in California. About 1.3 x 10^6 live in Maine. About how many times more people live in California than live in Maine?
- 3 times as many
- 30 times as many
- 300 times as many
- 3 x 10^6 times as many
Divide the number of people in California (3.9x10^7) by the number of people in Maine (1.3x10^6)
(3.9x10^7) / (1.3x10^6) = 30
The time it takes for a pendulum of a grandfather clock to swing back and forth one time is called the period of the pendulum. For a pendulum of length L (in feet), the period T (in seconds) is given by the equation T = 1.57 x Square root of L/2 . What is the period (in seconds) of a pendulum that is 8 feet long? Type the exact answer. Do not label seconds in your answer.
PLEASE ANSWER AS FAST AS POSSIBLE
Answer:
3.14
Step-by-step explanation:
What is the product of 4 Over 5 times two-fifths?
A model representing 4 Over 5 and two-fifths
6 Over 25
8 Over 25
6 Over 10
20 Over 10
Answer:
8 over 25 or 8/25
Step-by-step explanation:
Hope this Helps!!
PLEASE HELP ME !!!!!!
Step-by-step explanation:
In this question as two straight lines intersect each other
we use vertically opposite angle axiom
so 74 degree = 2x.
then x= 74/2= 37degree
Answer:
Angle 74 degrees and 2x are vertical, so they would have to equal each other.
Note: Vertical angles are congruent meaning they measure the same degrees
So we set up the equation;
74 = 2x
/2 /2
37° = x
It takes Krys and Glen 1_4hour to walk a mile. This week Krys walked 9 miles and Glen walked 3 miles. How much longer did Krys walk than Glen?
Answer:
Krys walked 1 1/2 hours longer than Glen.
Step-by-step explanation:
Glen walked 3 miles
3 x 1/4 = 3/4
Krys walked 9 miles
9 x 1/4 = 9/4
9/4 - 3/4 = 6/4
6/4 = 1 2/4
1 2/4 = 1 1/2
gl
hi! can you answer the question followed in the "hey brains!!.odt"! thanks!;)))
Answer:
I believe the answer is 13/945
Answer:
Brainliest Plzzz!!!
Step-by-step explanation:
please help me!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Pls help thank you..
Answer:
10
Step-by-step explanation:
1. The scores from a statistics test were
99, 60, 82, 78, 93, 71, 68, 86, 80, 95, 72, 64
a. Calculate the mean and standard deviation for the class
(to the nearest whole number)
b. Drawn and label the normal distribution curve,
and
c. 68% of the students have a test score between
and
d. 95% of the students have a test score between
e. What percentage of the students scored less than a 792
f. What percentage of the students scored between a 55 and a 912
Answer:
Mean = 79
Step-by-step explanation:
99 + 60 + 82 + 78 + 93 + 71 + 68 + 86 + 80 + 95 + 72 + 64
Then divide by 12 because that's the total of numbers there are.
So 948 / 12 = 79
ill make brainliest if someone helps me
Answer:
3:1 9 7
Step-by-step explanation:
Answer:
The ratio is 2:3/4
The value of the ratio is [tex]2\frac{3}{4}[/tex]
The amount of white grape juice is __ amount of sugar.
Step-by-step explanation:
i dont know the third one, please specify if it's a number or a word