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torisob [31]
3 years ago
15

Which expressions are equivalent to 4^-2 times 7^-2

Mathematics
1 answer:
Harlamova29_29 [7]3 years ago
7 0

Step-by-step explanation:

= {4}^{ - 2}  \times  {7}^{ - 2}

=  {(4 \times 7)}^{ - 2}

=  {28}^{ - 2}

=  \frac{1}{ {28}^{2} }

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30 Points!!Need Help Please!!! Will give Brainliest!!!
mixer [17]

Since DC = 12, then EF also = 12.

Both AD and BC are indicated to be the same .

So AE = (24 - 12) / 2 = 12/2 = 6


Now you have a right triangle with height DE = 8 and base AE = 6


Using the Pythagorean Theorem we can now find AD:


AD = √(8^2 + 6^2)

AD = √(64 + 36)

AD =√100

AD = 10

3 0
3 years ago
What is the approximate solution to the equation 2^t =38
timurjin [86]

2^t =38

take the log of each side

log ( 2^t) = log (38)

the exponent gets multiplies

t log (2) = log (38)

divide by log 2

t = log(38)/log (2)

t≈5.2479


3 0
3 years ago
Write this ratio as a fraction in simplest form without any units. 28 quarts to 9 gallons You can use the table below to help co
jolli1 [7]

Answer:

  7/9

Step-by-step explanation:

In order to write the fraction without any units (as a pure number), we must have units in the numerator and denominator that are the same. Then the units cancel.

<h3>Convert to gallons</h3>

We are given the conversion ...

  4 quarts = 1 gallon

Multiplying by 7, we see ...

  28 quarts = 7 gallons

<h3>Ratio</h3>

This lets us write the desired fraction as ...

  (28 quarts)/(9 gallons) = (7 gallons)/(9 gallons) = 7/9

The ratio in simplest form is 7/9.

4 0
2 years ago
What is 1% of 3,000?
gladu [14]

Answer:

30

Step-by-step explanation:

As 1 percent is equal to 1/100

1/100 of 3000 (1/100 x 3000)

equals to...

30

3 0
3 years ago
Read 2 more answers
Hey can someone please help, i dont know how to do this
yKpoI14uk [10]
Use the tenth’s theory and herons theory u will get it
6 0
3 years ago
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