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2 years ago

Find x, y, and z.

Mathematics

1 answer:

earnstyle [38]2 years ago

5 0

Answer:

x=4.5,y=5,z=9

Step-by-step explanation:

First, we use the pythagorean theorem in the lower right triangle (with sides 4,x,6) and find x^2+4^2=6^2 and therefore x^2=6^2-4^2=20 so x=√20 which is approximately 4.5.

Also, we can see from the picture that z=y+4, and therefore the only option left is x=4.5,y=5,z=9.

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a purse contains 25p coins and 50 p coins. the total amount in the purse is rs.25. if the number of 50 p coins is double the num

erica [24]

Let the total no. of 25 p coins be x
50p coins = 2x

Value of 25 p coins ( in rupees) = 0.25*x =0.25x
Value of 50p coins ( in rupees) = 0.5*2x = x

0.25x+x = 25
1.25x =25
x = 25/1.25 = 20

no. if 25p coins = 20
and 50p coins = 2*20 = 40

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3 years ago

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nadya68 [22]

Answer:

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2 years ago

What is the slope of the line in the coordinate plane?

liberstina [14]

Answer:

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2 years ago

debra buys a new mountain bike for 750 dollars . Sales tax is 9% . how much does Debra actually have to pay ?

Georgia [21]

Answer:

$817.50

Step-by-step explanation:

Hello Matt7151!

To find the total amount, we will first need to find how much tax.

We can express 9% as the fraction $\frac{9}{100}$ .

$\frac{9}{100}$ × 750 = 67.50

So she's paying $67.50 sales tax.

750.00

67.50

-------------------

817.50

So Debra's really paying $817.50.

Thus, the answer is $\boxed{$817.50}$$ $\boxed{817.50}$ .

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3 years ago

Solve x/5 - 1=7? help please !!

xxTIMURxx [149]

First, add 1 on both sides of the equation to begin to isolate x

x/5 = 8

Now, to isolate x, multiply both sides of the equation by 5/1

$\frac{x}{5}$ · $\frac{5}{1}$ = $\frac{5x}{5}$ = x

x= 7 · 5/1 = 7 · 5 = 35

x = 35

6 0

2 years ago