Answer:
I am sorry I don't onow
Step-by-step explanation:
Answer: 6.00 + 3.60x
Step-by-step explanation:
Regular coffee= 2.00 each
Letters= 3.50 each
Samantha buys 3 regular coffees and x letters.
To get the total amount she spends at the coffee shop, we multiply each quantity bought by the price. Therefore, total amount will be:
= (2.00×3) + (3.50×x)
= 6.00 + 3.50x
The expression for the amount spent at the coffee shop is 6.00+3.50x
The answer is
![\sqrt[3]{ \frac{ a^{6} b^{9} }{-64} } = \frac{ \sqrt[3]{a^{6} b^{9}} }{ \sqrt[3]{-64} } = \frac{ \sqrt[3]{a^{6}} * \sqrt[3]{ b^{9}} }{ \sqrt[3]{-64}}](https://tex.z-dn.net/?f=%20%5Csqrt%5B3%5D%7B%20%5Cfrac%7B%20a%5E%7B6%7D%20b%5E%7B9%7D%20%20%7D%7B-64%7D%20%7D%20%3D%20%5Cfrac%7B%20%5Csqrt%5B3%5D%7Ba%5E%7B6%7D%20b%5E%7B9%7D%7D%20%7D%7B%20%20%5Csqrt%5B3%5D%7B-64%7D%20%20%7D%20%3D%20%5Cfrac%7B%20%5Csqrt%5B3%5D%7Ba%5E%7B6%7D%7D%20%2A%20%5Csqrt%5B3%5D%7B%20b%5E%7B9%7D%7D%20%7D%7B%20%20%5Csqrt%5B3%5D%7B-64%7D%7D%20)
Since (xᵃ)ᵇ = xᵃ*ᵇ, then:
a⁶ = (a²)³
b⁹ = (b³)³
Also: 64 = 4³
![\frac{ \sqrt[3]{a^{6}} * \sqrt[3]{ b^{9}} }{ \sqrt[3]{-64}}= \frac{ \sqrt[3]{( a^{2})^{3} }*\sqrt[3]{( b^{3})^{3} } }{\sqrt[3]{( -4)^{3} }} = \frac{ a^{2} * b^{3} }{-4}](https://tex.z-dn.net/?f=%5Cfrac%7B%20%5Csqrt%5B3%5D%7Ba%5E%7B6%7D%7D%20%2A%20%5Csqrt%5B3%5D%7B%20b%5E%7B9%7D%7D%20%7D%7B%20%5Csqrt%5B3%5D%7B-64%7D%7D%3D%20%5Cfrac%7B%20%5Csqrt%5B3%5D%7B%28%20a%5E%7B2%7D%29%5E%7B3%7D%20%7D%2A%5Csqrt%5B3%5D%7B%28%20b%5E%7B3%7D%29%5E%7B3%7D%20%7D%20%7D%7B%5Csqrt%5B3%5D%7B%28%20-4%29%5E%7B3%7D%20%7D%7D%20%3D%20%5Cfrac%7B%20a%5E%7B2%7D%20%2A%20b%5E%7B3%7D%20%7D%7B-4%7D%20)
Given:
12 students average 70%
18 students average 80%
What is the overall average of the 30 students as a percent?
12 x 70% = 840%
18 x 80% = 1440%
840% + 1440% = 2280%
2280% / 30 = 76%
The overall average of the 30 students is 76%.
