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kozerog [31]
3 years ago
14

Evaluate the expression: 6(a + b) where a = -3 and b = 6

Mathematics
1 answer:
levacccp [35]3 years ago
8 0

Answer here you go

Step-by-step explanation:

(-3 x 6 = -18)

6 x -18= -108

multiplication with postive and gegitives rule of thumb

negative times a positive equals a negative

negitive times a negative equals a positive

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A fountain is made up of two semicircles and a quarter circle. Find the perimeter of the fountain. Round your answer to the near
slamgirl [31]

complete question:

A fountain is made up of two semicircles and a quarter circle. The diameter of the semicircles is 10 ft.  Find the perimeter of the fountain. Round your answer to the nearest tenth.  The picture is represented below.

Answer:

The perimeter of the fountain = 47.1  ft

Step-by-step explanation:

The fountain has 2 semi circle from a smaller circle with the diameter represented as 10 ft and a quarter circle from a bigger circle with the radius equals to 10 ft.

The perimeter is the distance around the fountain.The perimeter is the circumference in circular perspective. Therefore,

perimeter for a full circle = 2πr

Half circle = 2πr/2 = πr

For 2 half circle = πr + πr = 2πr

For 2 half circle = 2πr

r = 10/2 = 5

perimeter for 2 half circle = 2 ×  5 × 3.14 = 31.4  ft

Perimeter for the quarter circle

r = 10 ft

Quarter circle perimeter = 1/4 × 2πr = πr/2

Quarter circle perimeter = (3.14 × 10)/2

Quarter circle perimeter = (31.4)/2

Quarter circle perimeter = 15.7  ft

The perimeter of the fountain = 15.7  ft + 31.4  ft = 47.1  ft

4 0
3 years ago
A line has a rise of 6 and a slop of 1/20<br> What is the run?
mars1129 [50]

Answer:Answer:

The 'run' is  

120

Explanation:

The simple way of explaining slope is to say  

rise

run

The slope in this case is the simplified answer, so to find what it was, write equivalent fractions.

6

x

=

1 20

x

=

20

×

6

=

120

6

120

=

1

20

The 'run' is  

120

7 0
3 years ago
Read 2 more answers
I need some help. I will try to give brainliest
Rudiy27

Answer:

Step-by-step explanation:

7 0
3 years ago
I need Answer pls plz pls pls
Fofino [41]

Answer:

±square root 20

Step-by-step explanation:

x²= 20

x= square root 20

x= 2 square root 5

x≈ 4.4721

3 0
3 years ago
Multiply the following polynomial and write the resulting polynomial in descending order. (3x-8)(2x^2+4x-9)
Step2247 [10]
(3x-8)(2x^2+4x-9)=6x^3+12x^2-27x-16x^2-32x+72=6x^3-4x^2-59x+72

Value of the coefficient of the x^3 term is \boxed{6}

Value of the coefficient of the x^2 term is \boxed{-4}

Value of the coefficient of the x term is \boxed{-59}

The value of the constant is \boxed{72}

:)
7 0
3 years ago
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