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romanna [79]
3 years ago
6

Helpppp

Mathematics
1 answer:
earnstyle [38]3 years ago
7 0

Answer:

Y=2x-5

Step-by-step explanation:

please mark me as brainlest

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Which system has the same situation below?
Likurg_2 [28]

Answer:

2

Step-by-step explanation:

Let's solve the given system of equations.

<u>Given system</u>

x +3y= 10 ----(1)

-2x -2y= 4 ----(2)

From (2):

-2(x +y)= 4

Dividing both sides by -2:

x +y= -2 ----(2)

Thus, options 3 and 4 are incorrect as x +y≠ -2.

(1) -(2):

(x +3y) -(x +y)= 10 -(-2)

Expand:

x +3y -x -y= 10 +2

2y= 12

Divide both sides by 2:

y= 12 ÷2

y= 6

Substitute y= 6 into (2):

x +6= -2

x= -6 -2

x= -8

Options (1) and (2) differs only by the value of the expression of -x +y. Thus, let's find its value in the given system of equations.

-x +y

= -(-8) +6

= 8 +6

= 14

Thus, option 2 is the correct option.

7 0
2 years ago
How much less is -2than 3
Law Incorporation [45]
-2 is 5 less than 3

hope this helps
6 0
3 years ago
Read 2 more answers
The National Assessment of Educational Progress (NAEP) includes a mathematics test for eighth-graders. Scores on the test range
LiRa [457]

Answer:

Its standard deviation is 3.79.

Step-by-step explanation:

The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean \mu and standard deviation \sigma, the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean \mu and standard deviation s = \frac{\sigma}{\sqrt{n}}.

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

In this problem, we have that:

\sigma = 125, n = 1089

So

s = \frac{125}{\sqrt{1089}} = 3.79

Its standard deviation is 3.79.

7 0
3 years ago
The endpoints of the diameter of a circle are (-7, 3) and (5, 1). What is the center of the circle?
MrMuchimi

Answer:   C. (-1, 2)

<u>Step-by-step-explanation:</u>

The center is the midpoint of the endpoints

 

  →          \bigg(\dfrac{x_1+x_2}{2}       ,      \dfrac{y_1+y_2}{2}\bigg)

    →           \bigg(\dfrac{-7+5}{2}         ,       \dfrac{3+1}{2}\bigg)

    →               \bigg(\dfrac{-2}{2}             ,          \dfrac{4}{2}\bigg)

    →                (-1              ,            2)

The midpoint is (-1, 2)

8 0
3 years ago
You use a tape measure to measure the dimensions of a canvas, as shown. Estimate the area of the
Kazeer [188]

2000 cm^2

Step-by-step explanation:

we simply round the dimensions of 50.8 cm to 50 cm and 40.6 cm to 40 cm, and we multiply 50*40 cm to get to 2000cm^2 (it is squared because this is area)

8 0
2 years ago
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