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amid [387]
3 years ago
13

- 5x + 2y = 9 y = 7x

Mathematics
1 answer:
Lorico [155]3 years ago
8 0

Answer:

<h2><u>x = 1</u></h2>

Explanation:

- 5x + 2y = 9

  • y = 7x
  • <u>Insert 7x For 'y'</u>

- 5x + 2(7x) = 9

  • <u>Remove Parenthesis</u>

-5x + 2 · 7x = 9

  • <u>Multiply: 2 · 7 = 14</u>

-5x + 14x = 9

  • <u>Add: -5x + 14x = 9x</u>

9x = 9

  • <u>Divide Both Sides By 9</u>

9x ÷ 9 = 9 ÷ 9

<h2><u>x = 1</u></h2>
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If w and are numbers, which of the following expressions will always be the distance between w and Q
aev [14]
<h3>Answer: Choice A.  |w - q|</h3>

Let's say for example that w = 10 and q = 7. This means the distance between these values is w-q = 10-7 = 3. This is the distance between w and q.

Now let's make q larger. If w = 12 and q = 20, then w-q = 12-20 = -8 assuming we subtract in the same order. We use absolute value bars to ensure the result is positive. So instead we say

|w - q| = |12 - 20| = | -8 | = 8

Distance is never negative.

3 0
3 years ago
PLEASE HELP!!!!!!! this is really hard!!!
bekas [8.4K]
When Anne Betty and Cynthia compared the amount of money each had, they discovered that Anne and Betty together had $12 Betty and Cynthia together had $18 and Anne and Cynthia together had $10. 
<span>Who had the least amount of money? and how much was it?
a +b = 12
b + c = 18
a + c = 10
So what I did is simple XD A logical guess and check. I started with a = 1, but that was to little. And also didn't match up. So I kept going up and got a = 2, b = 10, and c = 8</span>
4 0
3 years ago
16. John bought a used truck for $4,500. He made an agreement with the dealer to put $1,500 down and make payments of $350 for t
nikklg [1K]
10*350= 3500
Total amount paid- 1500+3500= 5000
So an amount of $5000 was paid to cover the cost of $4500 within the 10 month period.

So you answer is A. 33%
3 0
3 years ago
Read 2 more answers
Please help, i need to know
klasskru [66]

Step-by-step explanation:

option a is correct

and d too and

-4b⁴ one Is wrong and -5x³

7 0
2 years ago
A rose garden is formed by joining a rectangle and a semicircle, as shown below. The rectangle is 31 ft long and 20 ft wide. If
vekshin1

Answer:

133 ft

Step-by-step explanation:

Given in the question,

length of the rectangle = 31 ft

width of the rectangle= 20 ft

diameter of semicircle = 20 ft

radius of semicircle = 20/2 ft = 10 ft

Formula to use:

<h3>perimeter of rectangle + perimeter of semicircle</h3>

perimeter of rectangle = 2(l+w)

perimeter of semicircle = 1/2(2πr)

Plug values in the formula above

2(31 + 20) + 3.14(10)

133.4 ft

≈ 133 ft

7 0
3 years ago
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