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3 years ago

Marcy played the piano for 45 minutes.She stopped playing at 4:15 P.M.At what time did she start playing the piano

Mathematics

1 answer:

musickatia [10]3 years ago

3 0

15-45=-30
60-30=30
so the answer is 3:30

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List all the pairs of integers with a product of 36. then find the pair whose sum is 20

RoseWind [281]

This is an excellent practice for the solution of quadratic equations.

1*36=36 => (1,36)
2*18=36 => (2,18)
3*12=36 => (3,12)
4*9=36 => (4,9)
6*6=36 => (6,6)
9*4=36 => (9,4)
12*3=36 => (12,3)
18*2=36 => (18,2)
36*1=36 => (36,1)

We can see that the sum decreases until the two factors are close (or equal) and then increases again.

The pair of integers with a sum of 20 is therefore (2,18) or (18,2).

4 0

4 years ago

Read 2 more answers

What is the percent of 45/100?

myrzilka [38]

45/100 is 4,500% 2/5 is 40% 18/40 is 45% 15/25 is 60%

5 0

3 years ago

What is the value of 3 in 230,001

Katyanochek1 [597]

30,000
the way you can solve this is by removing all numbers in front of the selected number(in this case, 2 should be removed) then change all numbers behind to 0.

6 0

3 years ago

Queetlon 10 or 15

Marrrta [24]

Answer:

[B]

Step-by-step explanation:

Given:

People leaving the library were asked how many books they checked out that day The result are: 1,2, 3, 5, 8, 9, 10, 11, 12, 13, 14, 15, 16, 18, 20

To Find:

Which histogram correctly shows the data set?

Solution:
Since it given from the histogram:

0-5, 6-11, 12 - 17,18-23

From the result :

1,2, 3, 5, 8, 9, 10, 11, 12, 13, 14, 15, 16, 18, 20

Thus,

1,2,3,5 = 0-5

8,9,10,11 = 6-11

12,13,14,15,16 = 12-17

18,20 = 18-23

From this we can see that:

for

0 - 5 = 4

6 - 11 = 4

12 - 17 = 5

18 - 23 = 2

Hence, the answer is [B]

Kavinsky

5 0

2 years ago

If f(x) = 2x2 + 3x and g(x) = x – 2, what is (f + g)(2)?

Trava [24]

$\text{Solve the expression}\\\\\text{First, add the expressions together:}\\\\2x^2+3x+x-2\\\\2x^2+4x-2\\\\\text{Plug in 2 to x:}\\\\2(2)^2+4(2)-2\\\\\text{Solve:}\\\\2(2)^2+4(2)-2\\\\2(4)+4(2)-2\\\\8+8-2\\\\16-2\\\\14\\\\\boxed{\text{Answer: B).14}}$

5 0

3 years ago