Ask question

Ask question

All categories

3 years ago

14

Maria spend 5 hours studying and earned a 90 on her exam. If you want to score a 81, how much time do you need to spend studying

?

1 answer:

Oliga [24]3 years ago

7 0

Answer:

4hrs 30 mins

Step-by-step explanation:

5hrs-90

x-81

cross multiplying gives us

405-90x then dividing through made x=4.5 which is = 4hrs 30mins

You might be interested in

Simplify √ 96/8 a.√2/4 b.1/2√3 c.4√3/√2 d. 2√3

VARVARA [1.3K]

The first one is: √ 96/8=2 √ 3

5 0

3 years ago

Anyone want to ch at?

algol13

Answer:

sure?

Step-by-step explanation:

7 0

2 years ago

Read 2 more answers

Write a fact with the same sum as 7+5

kaheart [24]

7+5=12 so it can be one of these 8+4=12, 9+3=12, 10+2=12, and 11+1=12.

5 0

3 years ago

1. You roll a standard number cube. Find P(number greater than 2).

ra1l [238]

Answer:

P={3,4,5,6}

Step-by-step explanation:

Cube=6 sides={1,2,3,4,5,6}

P>2

P={3,4,5,6}

7 0

3 years ago

Find the value of x.<br> 8<br> 5<br> X + 20<br><br> I need help please

Deffense [45]

Answer:

$x=-\frac{68}{9}$

Step-by-step explanation:

$\frac{9}{14}=\frac{8}{x+20}\\$

$9(x+20)=8*14\\9x+180=112\\9x=-68\\x=-\frac{68}{9}\\$

5 0

3 years ago