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Morgarella [4.7K]
3 years ago
6

Somebody help me out

Mathematics
1 answer:
Alekssandra [29.7K]3 years ago
3 0

Given Function : f(x) = -3x² + 3x + 7

To find out the value of f(8) : Substitute 8 in the function in place of x

⇒   f(8) = -3(8)² + 3(8) + 7

⇒   f(8) = -3(64) + 24 + 7

⇒   f(8) = -192 + 24 + 7

⇒   f(8) = -161

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Flura [38]
30 pages

We know that there are 60 minutes in an
hour, and that 3 goes into 60 20 times
(3/60 = 20). Multiply 1 1/2 x 20, and that
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You can also set it up in fraction form
multiply 1.5/3 times x/60. cross multiply and
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7 0
3 years ago
The difference between four times a number and five has a result of negative eight.
rosijanka [135]

Answer:

-0.75

Step-by-step explanation:

4x -5 = -8

1. -8 - (-5)=-3

2. -3 divided by 4 =-0.75

6 0
3 years ago
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Aless and Louis are going to put a rectangular pool in their backyard. The cost of installation is $6,000. If the dimensions of
lana [24]

Answer:

cost of the pool per cubic meters = $5

Step-by-step explanation:

The rectangular pool has a dimension of 30 m by 20 m by 2 m. To know the cost of the pool per cubic meter we have to calculate the volume of the pool . Then divide the total cost of the pool by it volume.

volume of the rectangular pool = length × height × width

volume of the rectangular pool = 30 × 20 × 2

volume of the rectangular pool = 1200  m²

The cost of installation is $6000 . The volume of the pool is 1200 cubic meters.

cost per cubic meters = total cost of installation/volume

cost per cubic meters = 6000/1200

cost of the pool per cubic meters = $5

7 0
3 years ago
Mary is also a civil engineer, and she is building a triangular community garden. She knows two angles in the triangular garden,
pantera1 [17]

Answer:

A= 61

B=119

Step by step:

a; interior angle

180-(27+92)

=180(119)

=61

b; exterior angle

180-61

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7 0
3 years ago
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ANSWER ASAP PLEASE BEING TIMEDDDDDDDD
Reil [10]
The answer is 8 + x > 5
An equation or an inequality that contains at least one variable is called an open sentence.
When you substitute the variable in an open sentence with a number the resulting statement is either true or false. If the statement is true the number is a solution to the equation or inequality.

Hope this helps you !!
5 0
3 years ago
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