Ask question

Ask question

All categories

2 years ago

7

Simplify (-8.5) (-5) (-2).

1 answer:

Ber [7]2 years ago

8 0

Answer:

-85

Step-by-step explanation:

(-8.5)(-5)(-2)

=(-8.5)(10)

=-85

You might be interested in

5y = 3478 - 3c if the equation above, c is a constant. If y = 8 is a solution to the equation, what is the value of c?

docker41 [41]

What you would do is simply plug in 8 where y is and solve.
5(8)=3478-3c -Times 5 by 8
40=3478-3c -Add 3c to the opposite side of the equal sign
40+3c=3478 -Subtract 40 from the opposite side of the equal sign
3c=3438 -Divide equation by 3
c=1146

Hope this helps! :)

5 0

3 years ago

A rectangular tank that is 5324 ft cubed with a square base and open top is to be constructed of sheet steel of a given thicknes

marishachu [46]

Answer:

Side of 22 and height of 11

Step-by-step explanation:

Let s be the side of the square base and h be the height of the tank. Since the tank volume is restricted to 5324 ft cubed we have the following equation:

$V = s^2h = 5324$

$h = 5324 / s^2$

As the thickness is already defined, we can minimize the weight by minimizing the surface area of the tank

Base area with open top $s^2$

Side area 4sh

Total surface area $A = s^2 + 4sh$

We can substitute $h = 5324 / s^2$

$A = s^2 + 4s\frac{5324}{s^2}$

$A = s^2 + 21296/s$

To find the minimum of this function, we can take the first derivative, and set it to 0

$A' = 2s - 21296/s^2 = 0$

$2s = 21296/s^2$

$s^3 = 10648$

$s = \sqrt[3]{10648} = 22$

$h = 5324 / s^2 = 5324 / 22^2 = 11$

4 0

3 years ago

John. wants to receive a 96% average on 4 math tests .So far he has taken 3 tests.His grades are 94%, 98%, and 98%. Write an equ

Drupady [299]

John must recieve a 95% on his next test

8 0

3 years ago

Preston is 8 years less than twice as many years old as tyler. If tyler is 12 years old, how old is preston

tia_tia [17]

Answer:

P=2T-8, if T=12, Preston, P=24-8=16 years old.

Hope this helps ;)

7 0

2 years ago

Read 2 more answers

Eva rode her bike at a steady speed to her grandmother's house, which was eight miles away, the ride took 40 minutes how many mi

Sliva [168]

Answer:

5 minutes

Step-by-step explanation:

8miles/1mile = 40minutes/ x minutes

x = 5 minutes

8 0

3 years ago

Read 2 more answers