3 years ago

Perform the operation, Enter your answer in scientific notation. 7 x 10² – 5.5 x 10²

Mathematics

2 answers:

PtichkaEL [24]3 years ago

8 0

The answer to your question is 150!

Elenna [48]3 years ago

3 0

Answer:

150 or 15^1

Step-by-step explanation:

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A rectangle has a length that is 9 feet less than four times its width. Its area is 90 square feet

kramer

Answer:

The length of rectangle is $15\ ft$

The width of rectangle is $6\ ft$

Step-by-step explanation:

Let

x-----> the length of rectangle

y----> the width of rectangle

we know that

The area of rectangle is equal to

$A=xy$

$A=90\ ft^{2}$

$90=xy$ -----> equation A

$x=4y-9$ -----> equation B

substitute equation B in equation A and solve for y

$90=(4y-9)y$

$4y^{2}-9y-90=0$

using a graphing calculator

The solution is

$y=6\ ft$

Find the value of x

$x=4y-9$ -----> $x=4(6)-9=15\ ft$

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4 years ago

Work out the area of a circle with radius of 7.5cm

lidiya [134]

Answer:

Area of circle is equal A = πr²

Here r = 7.5 and π = 3.142

so,

A = 3.142(7.5)²

A = 176.17 after rounding off.

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3 years ago

Y=-2x+2 y=1/3x-5 help pls

kupik [55]

The top part is -2(x-1). You have to factor out -2 from the expression. I don't know the second part, Sorry!

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3 years ago

Daniel made 6 out of 15 free throw shots. about how many out of the next 10 free throw shots would you expect him to make?

insens350 [35]

C) 4

x/10 = 6/15

x = (6/15) (10)

x = 60/15 = 4

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. In a ‘20% off’ sale, a coat was £120. Work out the original price.

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The coat now costs 96 Euros.

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