4 years ago

What times what equals 225?

Mathematics

1 answer:

defon4 years ago

4 0

I got 5 times 45 because I multiplied by 5 to get my answer.

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What ia the value of cosθ given that (-2,9) is a point on the terminal side of θ ?

pentagon [3]

Hello from MrBillDoesMath!

Answer:

Choice B, -2 sqrt(85) / 85

Discussion:

By definition,

cos(@) = length of side adjacent to angle / hypotenuse

= -2/ ( sqrt ( (-2)^2 + (9^2) ) (usin Pythag. theorem)

= -2/ sqty (4 + 81)

= -2 / (sqrt(85)

Multiply numerator and denominator by sqrt(85):

= (-2 / ( sqrt(85) ) * (sqrt(85)/sqrt(85) )

= -2 sqrt(85) / 85

which is choice B

Thank you,

MrB

4 0

3 years ago

Simplify and express the result in power notation with positive exponent

Molodets [167]

Answer:

3²

Step-by-step explanation:

Given expression:

$\sf (3^{-3} \div 3^{-10}) \times 3^{-5}$

Following the order of operations, carry out the calculations inside the parentheses first.

$\textsf{Apply the quotient exponent rule} \quad a^b \div a^c=a^{b-c}:$

$\implies \sf 3^{-3-(-10)} \times 3^{-5}$

$\implies \sf 3^{-3+10} \times 3^{-5}$

$\implies \sf 3^{7} \times 3^{-5}$

$\textsf{Apply the product exponent rule} \quad a^b \times a^c=a^{b+c}:$

$\sf \implies 3^{7+(-5)}$

$\sf \implies 3^{7-5}$

$\sf \implies 3^2$

Learn more about exponent rules here:

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4 0

2 years ago

Read 2 more answers

Write the prime factorization of 9. Use exponents when appropriate and order the factors from least to greatest (for example, 22

sleet_krkn [62]

Answer:

3 times 3 or 3²

Step-by-step explanation:

8 0

3 years ago

I will mark brainest if it is correct 1. 4x + 3 = x + 18 x=

vivado [14]

Answer

Step-by-step explanation:

Pls give brainliest to me

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3 years ago

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What is the SUM of the interior angle of a 22-gon? Use the formula below. S = (n -2) 180

stiks02 [169]

Answer:

3,600

Step-by-step explanation:

(22 - 2) x 180

20 x 180

3,600

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3 years ago