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worty [1.4K]
3 years ago
5

R 2- 12r - 28 = 0

lt="r 2- 12r - 28 = 0" align="absmiddle" class="latex-formula">
Mathematics
1 answer:
Neko [114]3 years ago
5 0

Answer:

Step-by-step explanation:

r² - 12r - 28 = 0

r² - (14 - 2)r - 28 = 0

r² - 14r + 2r - 28 = 0

r ( r - 14 ) + 2 ( r - 14 ) = 0

( r - 14) ( r + 2 ) = 0

Either

r - 14 = 0

r = 14

or

r + 2 = 0

r = -2

therefore r = - 2 or 14

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A car used 1/64 of a gallon of gas to travel a 1/4 mile. How many miles for 1 gallon
fiasKO [112]

Answer:

16

Step-by-step explanation:

1/4 ÷ 1/64

1/4 x 64/1=16

4 0
3 years ago
Dakota is an architect and is drawing the plans for a room addition for a client. If the shape of the room is a cube, what is th
slava [35]

Answer:

12,167 ft^3

Step-by-step explanation:

To find the volume of something, you simply multiply the length times width times height. The equation looks like this; v= lwh

A cube has equal measures of all sides-

23*23*23=12167

or

23^3=12167

Hope this helps:) Have a good rest of your day!

6 0
2 years ago
Enter the fraction as a decimal and a percent.
vodka [1.7K]

Answer:

1/1 (a whole)

1.00/1

8/8

1.00/1

Step-by-step explanation:

Multiply

7 0
3 years ago
Expand if necessary combine like terms (7+x)(7-x)=
mina [271]

Answer:

49 - x^2

Step-by-step explanation:

(7+x)(7-x)

We know this is the difference of squares

(a-b) (a+b) = a^2 - b^2

7^2 - x^2 = 49-x^2

We can also FOIL

first = 7*7 = 49

Outer: = 7x

Inner: = -7x

Last : -x*x = -x^2

Add them together

49 +7x-7x - x^2

Combine like terms

49-x^2

4 0
3 years ago
Curtis decided to go on a road trip to Canada. On the first day of his trip, he drove for 15 hours and traveled 1,005 miles. At
Radda [10]

Answer:

D

Step-by-step explanation:

1,005 / 15 = 67

3 0
3 years ago
Read 2 more answers
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