3 years ago

X-5/x=8/x+9 what’s the answer?

1 answer:

7 0

First, you move all the numerators above the common denominator. So, x-5/x - 8/x = 9. Then calculate x-5-8/x = 9. Multiple both sides of x, and you will get x-13/x = 9. Then, you move the terms so it will be x-13=9x. Finally solve the equation. So, it is -8x=13. And the final answer is -1.625 or you can leave it as -13/8.

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dexar [7]

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3 years ago

For the equation 2(4x+10)=8x+k what value of k will create an equation with infinitely many solutions?

Komok [63]

20; make both equations equal so whatever you plug in for x will be the same
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3 years ago

Read 2 more answers

M is directly proportional to r cubed when r = 4, m = 160. Find the value of r when m = 540

Anarel [89]

Answer:

r = 6

Step-by-step explanation:

Given that M is directly proportional to r³ then the equation relating them is

M = kr³ ← k is the constant of proportionality

To find k use the condition r = 4 when M = 160

k = $\frac{M}{r^3}$ = $\frac{160}{64}$ = 2.5, so

M = 2.5r³ ← equation of proportionality

When M = 540, then

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216 = r³ ( take the cube root of both sides )

r = $\sqrt[3]{216}$ = 6

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3 years ago

Simon arranges 35 radio controlled cars in 5 rows on the shelf. Find the numbers of cars placed in each row in unit rate

jeka57 [31]

Answer:

Step-by-step explanation:

35 Toys ÷ 5

5 Rows ÷ 5

7 Toys

1 Row

7 Toys

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= 7 Toys per Row

Hope this helps :)

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3 years ago

Help. Please. I need help.

malfutka [58]

Answer:

C) 3x+20 < 50

Step-by-step explanation:

Since 50 is the limit as to what Mary wants to spend, the number on the left side should never be over 50, meaning that the total will be 'less' than 50

The 20 comes from how much she wants, meaning that 3x would be less than 10 dollars a gift.

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2 years ago