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Ad libitum [116K]
3 years ago
7

On average, Debbie can finish 4 algebra problem in 30 minutes. If Debbie works at this rate, how many problems will she solve in

2.5 hours? Justify your answer.
Mathematics
2 answers:
alexandr402 [8]3 years ago
5 0
She will solve 20 problems in 2.5 hours, 4*5 thirty minute sessions=20.
sertanlavr [38]3 years ago
4 0
If 4 = 30, that means 8 = 60 (which is one hour)

that means if 8 = 60, 16 = 120, 

If 120 is 2 hours, we need to add another 30 minutes. 
30 minutes is 4 algebra questions so our answer would be 20 = 150 minutes
150 minutes = 2.5 hours.
You might be interested in
Prove that the product of any two consecutive natural numbers is even.
Vitek1552 [10]

Answer with Step-by-step explanation:

Let us assume the 2 consecutive natural numbers are 'n' and 'n+1'

Thus the product of the 2 numbers is given by

Product=n(n+1)\\\\

We know that the sum of 'n' consecutive natural numbers starting from 1 is

S_n=\frac{n(n+1)}{2}\\\\\therefore n(n+1)=2\times S_n............(i)

Thus from equation 'i' we can write

Product=2\times S_n

As we know that any number multiplied by 2 is even thus we conclude that the product of 2 consecutive numbers is even.

6 0
3 years ago
Simplify the expression. -5/8(-3/8-1/4) ​
prisoha [69]

Answer:

25/64

Step-by-step explanation:

To get this answer, first you need to use the distributive property:

(-3/8)(-5/8) - (1/4)(-5/8)

Next, multiply:

15/64 - (-5/32)

Change the negative signs into a positive sign:

15/64 + 5/32

Multiply 5/32 by 2 on both top and bottom:

15/64 + (5)(2)/(32)(2)

You will then get:

15/64 + 10/64

Now, add the numerators. You will get:

25/64

This is your answer. I hope it helped!

5 0
3 years ago
An appliance manufacturer recommends keeping the freezer at -18 degrees Celsius. What is |-18|
AURORKA [14]
These 'l l' lines mean absolute value. essentially it's asking how many units away from 0 a number is. Because of this all absolute values are positive numbers

l-18l=18
6 0
3 years ago
The height of a rectangle is 2 less than it’s base x if the perimeter of the rectangle is no less than 36 cm, find the base
Inessa [10]
10 I think because 10+10+8+8=36 and 8 is 2 less than 10
7 0
3 years ago
What is3\8 +5/2 need help
scoray [572]
3/8 + 5/2
=3/8 + 20/8
= 23/8
or
= 2 7/8
6 0
3 years ago
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