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3 years ago

!NUMBER 4! please help!! show all work please

Mathematics

1 answer:

snow_lady [41]3 years ago

7 0

Answer:

C. 88

Explanation:

f(x) = 4x + 8 || g(x) = x² + x

fg( -5 )

go from right to left in such function problems.

replace x with [ -5 ]

f( (-5)² -5)

f(20)

[ replace x with 20 ]

4(20) + 8

80 + 8

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Find the Least Common Denominator of the fractions: 3/5 and 27

Flauer [41]

Answer: 5

Step-by-step explanation:

The LCM for the denominators 5 and 1 is 5. So that means the LCD is 5.

3/5 = 3/5 x 1/1 = 3/5

27 = 27/1 x 5/5 = 135/5

3 0

3 years ago

Jim is painting the inside of a circular helicopter pad. How many cans of paint would he need if the pad is 50 feet across and e

djverab [1.8K]

STEP 1:
You need to find the area of the circular pad.

Circle Area= πr^2
we need the radius which is half of the diameter given
=π(50÷2)^2
=(3.14)(25)^2
=(3.14)(625)
=1,963.495 ft^2 total area

STEP 2:
Find how much paint is needed by dividing a can's coverage into what's needed.

=1963.495 ÷ 200
=9.817
=10 cans are needed (because you cannot buy a part of a can, you need to round up)

ANSWER: 10 cans are needed

Hope this helps! :)

5 0

3 years ago

As a maintenance electrician, it takes you 40 minutes to rewire a motor. You have 6 motors to rewire.

bazaltina [42]

Answer:

The maintenance electrician takes 287.555555566667 hours to to rewire all the motors

Step-by-step explanation:

1. Calculate all of the minutes for all the numbers.

It takes you 26.6666667 minutes to rewire 2/3 of a motor.

It takes you 160 minutes to rewire 4 motors.

It takes you 266.666667 to rewire 6 2/3 motors

It takes you 7,200 minutes to rewire 180 motors

It takes you 9,600 minutes to rewire 240 motors

2. Add all of the minutes together.

26.666667 + 160 + 266.666667 + 7,200 + 9,600 = 17253.333334

It takes you 17253.333334 minutes to rewire 431.333333 motors

3. Convert minutes to hours

17253.333334/60 = 287.555555566667

It takes you 287.555555566667 hours to rewire all the motors

7 0

4 years ago

X + 1/2 = 17 need help fast

Paha777 [63]

Answer:

x=16.5

Step-by-step explanation:

-1/2 on both sides

17-0.5 or 1/2=16.5

7 0

3 years ago

Read 2 more answers

. If two polygons are similar how can you find the scale factor from one polygon to the other?

gayaneshka [121]

If two polygons are similar, then the ratio of a side-length of one of them
to the length of the corresponding side of the other one is the same number
for every pair of sides. All you need to do is find one pair of corresponding
sides, then find the ratio of their lengths, and there's your scale factor.

3 0

3 years ago