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Thepotemich [5.8K]
3 years ago
5

Y=x-7 Y=-4x-2 Solve by substitution help please

Mathematics
2 answers:
wlad13 [49]3 years ago
6 0

Answer:

(1, - 6 )

Step-by-step explanation:

Given the 2 equations

y = x - 7 → (1)

y = - 4x - 2 → (2)

Substitute y = x - 7 into (2)

x - 7 = - 4x - 2 ( add 4x to both sides )

5x - 7 = - 2 ( add 7 to both sides )

5x = 5 ( divide both sides by 5 )

x = 1

Substitute x = 1 into either of the 2 equations for corresponding value of y

Substituting x = 1 into (1)

y = 1 - 7 = - 6

Solution is (1, - 6 )

sergeinik [125]3 years ago
4 0

Answer:

6= 7-1

-14= -4·3-2

Step-by-step explanation:

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Find the missing dimension of each prism.
Leto [7]

Given:

Volume of the prism = 60 in³

Breadth = 2.5 in

Height = 4 in.

To find:

The length of the prism.

Solution:

We know that, volume of a prism is

V=l\times b\times h

where, l is length, b is breadth and h is height.

Putting V=60, b=2.5 and h=4, we get

60=l\times 2.5\times 4

60=l\times 10

Divide both sides by 10.

\dfrac{60}{10}=l

6=l

Therefore, the missing dimension of the prism is 6 in.

7 0
3 years ago
Someone help please thanks.
Lubov Fominskaja [6]

Answer:

t=x+44

Step-by-step explanation:

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7 0
2 years ago
N+10=8<br> What does N=?
Aleks04 [339]

Answer:

N= -2

Step-by-step explanation:

N+10=8

   -10= -10

        N= -2

4 0
2 years ago
Read 2 more answers
Evaluate the polynomial 6x - y for x = 3 and y =4
Mashcka [7]
6 x 3 is 18.  y is equal to 4.  18 minus 4 is 14.  The answer is 14.
8 0
3 years ago
5. A rectangular pool ha a length that is 13 meters longer than its width. perimeter is74 meters. What is the width Its of this
gregori [183]
Good evening Brian,

For this problem, let's look at what we're given.  So we have a pool with a length that is 13 m (meters) longer than its width, and we're given the perimeter, or distance around the entire pool, which is 74 m.

We know that the pool has a rectangular shape and that the perimeter of a rectangle is <span>width + length + width + length ⇒ 2(W) + 2(L)</span>.

Given the information provided, we can rewrite the equation to fit this problem.  Since we're told that the length is equal to 13 m + the width, so we can represent the length as W +13 m.  We can now rewrite the perimeter equation to be:

2(w) + 2 (w + 13 m) ⇒ 2(w) + 2(w) + 2(13 m) ⇒ 4(w) + 26 m = 74 m.

We're down to one variable now so this should be easy.  Subtract 26 m from both sides,

4(w) = 48 m

Now divide each side by 4 in order to find the width.

w = 12 m

-Hope this helps!


6 0
3 years ago
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