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7nadin3 [17]
3 years ago
12

Please Please Please help! 

Mathematics
1 answer:
lara [203]3 years ago
4 0
Take the first equation and set it to equal x by subtracting 5y from both sides and multiplying by -1.  Looks like this...

-x + 5y = 1
     -5y      -5y
-x = -5y + 1
-1(-x = -5y + 1)
x = 5y - 1   ... substitute this into the second equation you get.....

2(5y - 1) + 4y = -4   answer is #2
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1. Walmart’s stock price started at $70. It went up by $2, then went down by $4. What is the final stock price?
Paul [167]

Answer:

68

Step-by-step explanation:

70+2-4= 68

3 0
2 years ago
Find the y-intercept and x-intercept of the line.<br> -x+4y = 8
salantis [7]

Answer:

x-intercept(s):  ( − 8 , 0 )

y-intercept(s):  ( 0 , 2 )

Step-by-step explanation:

To find the x-intercept, substitute in  0  for  y  and solve for  x . To find the y-intercept, substitute in  0 for  x  and solve for  y.

7 0
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Suppose an aerial freestyle skier goes off a ramp with her path represented by the equation y=−0.024(x−25)2+40. If the surface o
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Answer:

Suppose an aerial freestyle skier goes off a ramp with her path represented by the equation y=−0.024(x−25)2+40. If the surface of the mountain is represented by the linear equation y=−0.5x+25, find the distance in feet the skier lands from the beginning

6 0
2 years ago
9. The ticket at right has a perimeter of 42 cm.
Liula [17]

Perimeter simply represents the sum of all side lengths of a shape. The length of the missing side of the ticket is 5 cm; the length of gold line on each ticket is 20 cm, and 2 bottles of gold ink are required to draw gold lines on 200 tickets.

I've added the image of the ticket as an attachment.

(a) The missing side length

From the attachment, the 4 unknown side lengths are equal. Represent this side length with L.

So, we have:

Perimeter =2\times 11 + 4 \times L

This gives

2\times11 + 4 \times L = 42

22 + 4 \times L = 42

Collect like terms

4 \times L = 42-22

4 \times L = 20

Divide both sides by 4

L =5cm

(b) The length of the gold lines

There are 4 slant lines and the length of one of the slant lines is 5 cm (as calculated above).

So, the length of the gold line is:

Gold = 4 \times L

Gold = 4 \times 5cm

Gold = 20cm

(c) The number of gold ink bottles.

n = 200 --- number of tickets

The length of all gold line in the 200 tickets is:

Length = 200 \times Gold

Length = 200 \times 20cm

Length = 4000 cm

Length = 4000 \times 0.01m ---- convert to meters

Length = 40m

Given that:

Bottle = 20m --- 1 bottle for 20 m

The number of bottles (n) is:

n = \frac{Length}{Bottles}

n = \frac{40m}{20m}

n = 2

Hence, 2 bottles of gold ink are enough.

Read more about perimeters at:

brainly.com/question/6465134

4 0
2 years ago
Use abc to find the value of sin a
kolbaska11 [484]

sin α = opposite leg/ hypotenuse

For ΔABC,

sin A = |BC|/|AB|

sin A = 12/37

7 0
2 years ago
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