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3 years ago

Michelle is giving a haircut and a permanent to another woman. The

Mathematics

1 answer:

Solnce55 [7]3 years ago

5 0

Answer:

$77 x 15/100 = $11.55

Step-by-step explanation:

15 percent of 77 dollars is 11.55

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21. What is the value of x if 5:(3x+2) = 7:(5x-2).<br>A. 6<br>B. 5<br>C.7.

KatRina [158]

Answer:

5/(3x+2) = 7/(5x-2)

<=>5*(5x-2) = 7*(3x+2) (x is not equal to -3/2 or 2/5)

<=> 25x -10 = 21x +14 (x is not equal to -3/2 or 2/5)

<=> 4x = 24 (x is not equal to -3/2 or 2/5)

<=> x = 6 (valid)

6 0

3 years ago

X²-9y²<br>can someone assist plz

Annette [7]

Answer:

${x}^{2} - 9 {y}^{2} \\ = {x}^{2} - {3}^{2} {y}^{2} \\ = {x}^{2} - {(3y)}^{2} \\ = (x - 3y)(x + 3y)$

3 0

3 years ago

What's the area of a square with a radius of 16 root 2

omeli [17]

That's impossible to say. The radius of a square is meaningless.

7 0

3 years ago

How do you evaluate a polynomial function?

amm1812

Step-by-step explanation:

Replace each x in the expression/equation with the given value. Then use order of operations to simplify and solve. There are some great videos out there explaining the concept.

4 0

3 years ago

Carl bought 19 apples of 2 different varieties to make a pie.The total cost of the apple was $5.10.Granny Smith apples cost $0.2

disa [49]

For this case we propose a system of equations:

x: Let the variable representing the quantity of Granny Smith apples

y: Let the variable representing the number of Gala apples

According to the statement we have:

$x + y = 19\\0.25x + 0.30y = 5.10$

From the first equation we have to:

$x = 19-y$

replacing in the second equation:

$0.25 (19-y) + 0.30y = 5.10\\4.75-0.25y + 0.30y = 5.10\\4.75 + 0.05y = 5.10\\0.05y = 5.10-4.75\\0.05y = 0.35\\y = \frac {0.35} {0.05}\\y = 7$

So, Carl bought 7 Gala apples

On the other hand:

$x = 19-7 = 12$

So, Carl bought 12 Granny Smith apples

Answer:

Carl bought 7 Gala apples and 12 Granny Smith apples

8 0

3 years ago