3 years ago

A test has 25 questions.

Mathematics

1 answer:

nadya68 [22]3 years ago

6 0

Answer:

Peter missed five questions.

Step-by-step explanation:

Since the test has twenty-five questions, and Peter got 80% correct...

80/100 = __/25 <--What number is the numerator?

Well, to get from 100 to 25, you have to divide by 4. 100/4 = 25.

Now, what is 80/4? If you do the math, you should get 20.

25 (Total Questions) - 20 (Questions Correctly Answered) = 5 (Questions Incorrectly Answered)

You might be interested in

Can someone find the error ??<br> And solve it<br> Please this geometry <br> Specials right triangle

Nuetrik [128]

In a 30-60-90 triangle the hypotenuse is 2 times the shortest leg.

In the problem, they multiplied the shortest leg by sqrt(3)

Hypotenuse = shortest leg x 2

Hypotenuse = 7 x 2 = 14 units

8 0

3 years ago

Read 2 more answers

A customer's monthly trash collection bill was $24.74. Due to a rate increase, her monthly bill is now $26.86. To the nearest te

Galina-37 [17]

Answer:

8.57%

Step-by-step explanation:

Find increase:

26.86 - 24.74 = 2.12.

Find percentage:

$\frac{2.12}{24.74}$ = 0.08569118835 = 8.57%

7 0

3 years ago

Can you help me with number 10

rewona [7]

$\bf ~\hspace{7em}\textit{negative exponents} \\\\ a^{-n} \implies \cfrac{1}{a^n} ~\hspace{4.5em} a^n\implies \cfrac{1}{a^{-n}} ~\hspace{4.5em} \cfrac{a^n}{a^m}\implies a^na^{-m}\implies a^{n-m} \\\\[-0.35em] \rule{34em}{0.25pt}\\\\ \cfrac{(3^{-2})^2}{3^{-3}}\implies \cfrac{3^{-2\cdot 2}}{3^{-3}}\implies \cfrac{3^{-4}}{3^{-3}}\implies \cfrac{1}{3^{-3}\cdot 3^4}\implies \cfrac{1}{3^{-3+4}}\implies \cfrac{1}{3^1}\implies \cfrac{1}{3}$