Ask question

Ask question

All categories

3 years ago

11

After getting back a grade math quiz, Lili notice that the ratio of questions she got wrong to questions she got right was 1:4.

If there were 15 total questions on the quiz, how many of them did she get wrong?

1 answer:

Nataly_w [17]3 years ago

4 0

Answer:

She got three wrong and 12 correct

You might be interested in

Sean invests $1,000 at 6%. How much will he earn interest, if he invest the money for three years?

dangina [55]

Answer:

This is your answer. If I'm right so,

Please mark me as brainliest. thanks!!!

3 0

3 years ago

The model shown represents which of the following?

-BARSIC- [3]

Answer:

its 3

Step-by-step explanation:

selcet 3 it goes plus 3 then back to neg 4 its the 3rd option

4 0

3 years ago

Read 2 more answers

What is the value of the expression? Do not use a calculator.<br><br> tan(-11pi/6)

Ivan

Tan(-11π/6)
= tan(π/6 - 2π)
= tan(π/6)
= √(3)/3

8 0

4 years ago

Read 2 more answers

A rectangular pool 12 meters by 8 meters is surrounded by a walkway of width x meters. At

Debora [2.8K]

Answer:

x=3 meters

Step-by-step explanation:

step 1

Find the area of the rectangular pool

$A=LW$

we have

$L=18\ m\\W=12\ m$

substitute

$A=18(12)=216\ m^2$

step 2

Find the area of rectangular pool including the area of the walkway

Let

x ----> the width of the walkway

we have

$L=(18+2x)\ m\\W=(12+2x)\ m$

substitute

$A=(18+2x)(12+2x)$

step 3

Find the area of the walkway

To find out the area of the walkway subtract the area of the pool from the area of rectangular pool including the area of the walkway

so

$A=(18+2x)(12+2x)-216$

step 4

Find the value of x if the area of the walkway equal the area of the pool

so

$(18+2x)(12+2x)-216=216$

Solve for x

$(18+2x)(12+2x)=432\\216+36x+24x+4x^{2}=432\\4x^{2} +60x-216=0$

Solve the quadratic equation by graphing

The solution is x=3 meters

see the attached figure

6 0

4 years ago

Read 2 more answers

What is the 8th term in the sequence?<br> 14 , 18 , 116 , 132 , ... <br> 14, 18, 116, 132, ...

klio [65]

I believe the sequence here is that you double the 1+ digits after the first 1, and then put it in front of the 1. Unfortunately, I can not think of a sequence. Try working this one out, as you know how to work it out. Tell me if you need more help!

6 0

4 years ago