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3 years ago

I need to know the answer before 8 pm today so pls help

Mathematics

1 answer:

Varvara68 [4.7K]3 years ago

8 0

1 hour 26 minutes sorry I didn't make your deadline

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Sarah answered 24 questions on her test correctly and earned an 80%. How many questions were on the test?

MaRussiya [10]

Answer:

43 questions in total

Step-by-step explanation:

the original equation with the unknown (total number of questions on the test) will look like this

$\frac{total \: number \: of \: questions \: on \: exam}{24 \: answered \: questions} = 80\%$

we know this because to work out a percentage in the 1st place you need the total ÷ number (in this case it's ÷ how many questions out of the total she did answer)

now you rearrange.

you need to move the 24 to get the total on it's own here's how you do it

$\frac{tot \: num \: of \: qs}{24} \times 24 = 80\% \times 24$

what you do to one side of equation you have to do to the other. the 24 and 24 on the left will cancel because 24÷24=1 and we don't write

got mum of Q's x 1= 80 x 24

now you convert % to decimal

$80\% \times 100 = 0.80$

replace

$tot \: num \: qs \: = 24 \times 0.80 = 19$

now you take the original and + the 19

$24 + 19 = 43$

therefore there are a total of 43 questions on the exam

5 0

3 years ago

The vertical asymptote of the function f(x) = 3 log(x + 3)

ipn [44]

A function has a vertical asymptote where it is not defined, and the logarithm is defined only if its argument is strictly positive: it has a vertical asymptote if its argument is zero, and is not defined if its argument is negative.

So, you have a vertical asymptote where

$x+3=0 \iff x=-3$

4 0

3 years ago

Which lists all the integer solutions of the inequality |x| < 3?

Alexus [3.1K]

Simple the answer is c 100% positive

5 0

3 years ago

Read 2 more answers

URGENT PLEASE ANSWER!

zheka24 [161]

Answer:

Step-by-step explanation:

$3x+7\\\\3\left(x+\dfrac{7}{3}\right)=(3)(x)+(\not3)\left(\dfrac{7}{\not3}\right)=3x+7\qquad\boxed{YES}\\_{\text{used the distributive property: a(b + c) = ab + ac}}\\\\x+x+x+5+1=(x+x+x)+(5+1)=3x+6\neq3x+7\qquad\boxed{NO}\\\\8x+3-5x+4=(8x-5x)+(3+4)=3x+7\qquad\boxed{YES}\\\\7x+3\neq3x+7\qquad\boxed{NO}$

6 0

3 years ago

When working with compounded interest does doubling the time of an investment double the amount of interest earned

Olin [163]

the equation for compound interest is

$A=P(1+r)^t$

we will see if it doubles or not

if t=1, we get A=P(1+r)

if t=2, we get A=P(1+r)^2

2(P(1+r))=P(1+r)^2 ?

2(1+r)=(1+r)^2 ?

2+r=r^2+2r+1

etc

when r=-1.618 or 0.618, then it doubles, but not when r is different things

not always

so no, it does not always double the amount of interest earned

3 0

3 years ago