3 years ago

Simplify (4/5)^-2 . Show your work!

Mathematics

1 answer:

jarptica [38.1K]3 years ago

5 0

Answer:

$\frac{25}{16}$

Step-by-step explanation:

Apply exponent rule: $x^{-y}=\frac{1}{x^y}$

$(\frac{4}{5}) ^{-2}=\frac{1}{\left(\frac{4}{5}\right)^2}=\frac{1}{\frac{16}{25}}=\frac{25}{16}$

You might be interested in

2/3q = 1/2 what does q equal as a decimal

goldfiish [28.3K]

Is that 2/3 of q or 2 over 3q?
for 2/3 of q. q=1/2 x 3/2 =3/4=0.75

for 2 over 3q q = 2 x 2/3= 4/3=1.3333

3 0

3 years ago

The dimensions of a rectangle are 20' by 40'. If a model rectangle with a scale of 5' = 10'' is to be made, find the dimensions

VMariaS [17]

20’ / 5’ = 4

4 x 10” = 40”

40’ /5’ = 8

8 x 10” = 80”

Scaled dimension: 40” x 80”

6 0

3 years ago

Express 0.55% a precent

cupoosta [38]

0.55%*100 = 55% is the answer

4 0

4 years ago

PLEASE HELP ASAP!!!

sergey [27]

Answer:

slope is equal to rise (going up or down on graph) over run (going left or right)

Step-by-step explanation:

1 = - $\frac{5}{4}$

2= $\frac{4}{2}$ = 2

3. $\frac{7}{3}$

4. - $\frac{4}{7}$

5. $\frac{3}{6}$ = $\frac{1}{2}$

6. - $\frac{2}{8}$ = - $\frac{1}{4}$

8 0

3 years ago

The time to complete a standardized exam in the BYU-Idaho Testing Center is approximately normal with a mean of 70 minutes and a

leva [86]

Answer:

Step-by-step explanation:

Given that X the time to complete a standardized exam in the BYU-Idaho Testing Center is approximately normal with a mean of 70 minutes and a standard deviation of 10 minutes.

We have 68 rule as 2/3 of total would lie within 1 std deviation, and 95 rule as nearly 95% lie within 2 std deviations from the mean.

We have std deviation = 10

Hence 2 std deviations from the mean

= Mean ±2 std deviations

= $70$ ±20

= $(50,90)$

Below 50, 0.25 or 2.5% would complete the exam.

3 0

3 years ago