MATHEMATICS MIDDLE SCHOOL

(30 POINTS!!!) One press can run the day’s newspapers in 6 hours, while another can do the same job in 8 hours. After running together for 2 hours to complete the job, the faster one breaks. How much longer must the slower press run to finish the newspapers?

Answers

Answer 1
Answer:

Amount of the job done after 2 hours:

2(1/6 + 1/8)

2(4/24 + 3/24)

2(7/24)

7/12 (amount of job finished)

.

amount of job left to do:

1 - 7/12

 

12/12 - 7/12

5/12 (remaining)

.

Let x = time (hours) slower press takes to finish job

then

x(1/6) = 5/12

multiplying both sides by 6:

x = 5/12 *6

x = 5/2 hours

or

x = 2 hours and 30 minutes

The slower press (8-hour press), will take h 3 hours, 20 minutes to complete the job

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PLS HELP ME W THIS QUESTION

Answers

Answer:

A. 60 in³

Step-by-step explanation:

The formula of a volume of a cone:

V=(1)/(3)\pi r^2H

r - radius

H - height

We have r = 1.9 in and H = 15 in. Substitute:

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\pi\approx3\to V\approx18.05\cdot3=54.15\ in^3

14. According to a recent government study, the average 15-year-old male gets 11.4% of his daily caloric intake from sugar drinks.If that 15-year-old consumes 2,400 calories each day, how many calories come from sugar drinks?

Answers

The calories come from sugar drinks = 269.76 calories

Step-by-step explanation:

  • Daily caloric intake from sugar drinks = 11.4%
  • Total calories consumed each day = 2400

Calories come from sugar drinks = 11.4% of 2400

⇒ (11.4/100)*2400

⇒ 11.4*24

⇒ 269.76 calories.

∴ Calories come from sugar drinks is 269.76 calories.

Recall that two angles are complementary if the sum of their measures is 90°. Find the measures of two complementary angles if one is 10 degrees more than four times the other angle.

Answers

Answer:

x+4+×=90

2×=86

×=43

now,

x+4=47

What best describes the Numbers 5 Both prime, and composite

Answers

5 is a prime number. That's all I can help with.

Answer:

5 is prime because its only factors are 1 and 5.:-)

Step-by-step explanation:

In which quadrant of the coordinate plane is (a - 2, b + 3), if a = -3 and b = -5?

Answers

It's going to be in quadrant 3

Answer:

its q-2

Step-by-step explanation:

What is the value of the expression when p = –16 and q = 4?

4p/q

Answers

so subsitute
(4 times -16)/4=-64/4=-32/2=-16/1=-16
or
(4 times -16)/4=4/4 times -16/1=1 times -16=-16
answer is -16
We are simply trying to solve:      4p/q.

p = -16, q = 4.

= 4p/q  =  4 * -16 / 4 =  -16.    4 below divides into 4 at top. Left with -16 at top.

Answer = -16.
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