4 years ago

Find the height | A = 28 cm? 7 cm

Mathematics

1 answer:

Montano1993 [528]4 years ago

8 0

Answer:

4 cm = height

Step-by-step : 28/7 =4

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A rectangle has a length that is three feet more than twice it’s width. If the area of the rectangle is 90 square feet, then alg

Mkey [24]

Answer:

$Length=27feet\\Width=12 feet$

Step-by-step explanation:

Let, the length of the rectangle be 'L'

and, width of the rectangle be 'W'

length=2*Width+3

$L=(2W+3) feet\\\\$

Area of the rectangle= 90 square feet

Area of a rectangle = Length*Width

$90=(2W+3)*W\\\\2W^2+3W=90\\\\2W^2+3W-90=0\\\\$

Using Factorization Method to solve quadratic equation:

$2W^2-12W+15W-90=0$

Taking common from the equation:

$2W(W-12)+15(W-12)=90\\\\(W-12)(2W+15)=0\\\\W-12=0\\\\W=12 feet$

$2W+15=0\\\\2W=-15\\\\W=-7.5 feet$

The Width cannot be negative, therefore Width(W)=12 feet

$Length=2*Width+3\\\\=(12*2)+3\\\\=24+3\\\\=27 feet$

$Length=27feet\\Width=12 feet$

3 0

3 years ago

4x + 3y =4 2x - y =7 in substitution

IRINA_888 [86]

The answer is (4x+3y=4 2x-7=7: 5/2 and y=-2) hope it helps and have a good day!

4 0

3 years ago

How many solutions in x^2=64

Hitman42 [59]

Answer:

x = 8

x = -8

Step-by-step explanation:

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3 years ago

A magazine subscription runs several promotions. Customers can choose from the following deals:

icang [17]

1.8461 diveded 12/86

7 0

3 years ago

Use the digits 2,3,and 4 one time each to correctly complete the following problem. __00 * __ __ = 6,800

azamat

Answer:

200*34=6800

Step-by-step explanation:

Write the possible combinations like

200*34

200*43

300*24

300*42

400*32

400*23

then you chose what will give you 6800 as the answer

4 0

3 years ago