All categories

3 years ago

I need help solving systems of equations by substitution

Mathematics

1 answer:

Semenov [28]3 years ago

5 0

-7x-2y=-13
x= 2y+11 make x or why the subject and substitute it into the first equation.
-7(2y+11)-2y=-13
-14y-77-2y=-13
-16y=64
y=-4
x=-2×-4+11
x=3

You might be interested in

R varies inversely as v2 if r=120 when v=1 ,find r when v=10

makvit [3.9K]

<h3>♫ - - - - - - - - - - - - - - - ~Hello There!~ - - - - - - - - - - - - - - - ♫</h3>

➷ r = k/v^2

Substitute the values in:

120 = k/1^2

Multiply both sides by 1^2 to find k

k = 120

Substitute new values in:

r = 120/10^2

Solve:

r = 1.2

➶ Hope This Helps You!

➶ Good Luck (:

➶ Have A Great Day ^-^

↬ ʜᴀɴɴᴀʜ ♡

6 0

3 years ago

Jack needs 22 pirate for every two pirate ships he Manages

solniwko [45]

Answer:

Hi there! There is only one part of a question. I‘m not sure how to help you...

Sorry! Have a good day/night!

Step-by-step explanation:

3 0

3 years ago

Which one of the following is always true?a. The coefficient of variation measures variability in a positively skewed data set r

Tom [10]

Answer:

C. The coefficient of variation is a measure of relative dispersion that expresses the standard deviation as a percentage of the mean, for any data on a ratio scale and an interval scale

Step-by-step explanation:

Th Coefficient of Variance is a measure of dispersion that can be calculated using the formula:

$CV = \frac{\sigma_{x} }{\mu_{x} } * 100%$

Where $\sigma{x}$ is the Standard Deviation

and $\mu_{x}$ is the sample mean

From the formula written above, it is shown that the Coefficient of Variation expresses the Standard Deviation as a percentage of the mean.

Coefficient of variation can be used to compare positive as well as negative data on the ratio and interval scale, it is not only used for positive data.

The Interquartile Range is not a measure of central tendency, it is a measure of dispersion.

3 0

3 years ago

Which side lengths form a right triangle 4, 8, 12

Lostsunrise [7]

(4^2+8^2)^.5 = 8.944
It's not 12.
So 4,8,12 can't be the side lengths of a right triangle.

7 0

3 years ago

Plz help me I dont understand?

11111nata11111 [884]

Answer:

based on what I see

Step-by-step explanation:

I think first box is going to have 3 rectangles unshaded and two shaded

the 3rd box is going to have 9 unshaded and 6 shaded

6 0

3 years ago