Answer:
Distributive property
Step-by-step explanation:
Answer:
a. <u>y = $3 + $2.50x,</u>
b. <u>$23</u>
Step-by-step explanation:
y is the total cost of x gallons of gasoline at $2.50/gallon.
a. The total cost of one car wash ($23 each) plus x gallons of gas is:
<u>a. y = $3 + $2.50x</u>
<u></u>
b. The cost of a car wash and 8 gallons (x=8) is:
b. y = $3 + $2.50*(8)
y = $3 + $20
<u>y = $23</u>
Answer:
6
Step-by-step explanation:
Evaluate 4 z^2 - 3 z - 4 where z = 2:
4 z^2 - 3 z - 4 = 4×2^2 - 3×2 - 4
Hint: | Evaluate 2^2.
2^2 = 4:
4×4 - 3×2 - 4
Hint: | Multiply 4 and 4 together.
4×4 = 16:
16 - 3×2 - 4
Hint: | Multiply -3 and 2 together.
-3×2 = -6:
16 + -6 - 4
Hint: | Group the negative terms in 16 - 6 - 4 together and factor out the minus sign.
16 - 6 - 4 = 16 - (6 + 4):
16 - (6 + 4)
Hint: | Evaluate 6 + 4.
6 + 4 = 10:
16 - 10
Hint: | Subtract 10 from 16.
| 1 | 6
- | 1 | 0
| 0 | 6:
Answer: 6
Sqrt1/sqrt121
=1/11
need to use some extra characters
Answer:
Option B is correct answer.
Step-by-step explanation:
We need to solve the expression sec2xcot2x.
We know sec x = 1/ cos x and cot x = 1/ tan x and tan x = sin x/cos x and 1/tanx = cosx /sinx
Since in question we 2x instead of x so, replacing x with 2x and Putting values:
![sec2x\,\, cot2x\\=\frac{1}{cos 2x} * \frac{1}{tan 2x} \\=\frac{1}{cos 2x} * \frac{cos2x}{sin2x}\\=\frac{1}{sin 2x}\\=csc2x](https://tex.z-dn.net/?f=sec2x%5C%2C%5C%2C%20cot2x%5C%5C%3D%5Cfrac%7B1%7D%7Bcos%202x%7D%20%2A%20%5Cfrac%7B1%7D%7Btan%202x%7D%20%5C%5C%3D%5Cfrac%7B1%7D%7Bcos%202x%7D%20%2A%20%5Cfrac%7Bcos2x%7D%7Bsin2x%7D%5C%5C%3D%5Cfrac%7B1%7D%7Bsin%202x%7D%5C%5C%3Dcsc2x)
So, Option B is correct answer.