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Y=AB-8. Trying to learn how to solve for A.

Answers

Answer 1

Answer:

Answer:

$A=(Y+8)/(B)$

Step-by-step explanation:

So we have:

$Y=AB-8\n$

First, add 8 to both sides. The right will cancel:

$Y+8=AB$

Now, notice that A is multiplied to B. So, the isolate A, divide both sides by B. The right will cancel:

$A=(Y+8)/(B)$

And we're done!

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Hello, please I bed urgent help with this math problem please

Answers

Answer:

option C

Step-by-step explanation:

$4c^2 + 7c - 5 = 0 , \ where \ a = 4 , \ b = 7 , \ x = - 5$

$c = (- b \pm √(b^2 - 4ax ))/(2a) \n\nc = (- 7 \pm √(49 - ( 4 * 4 * - 5 )))/(2 * 4) \n\nc = (- 7 \pm √(49 + 80))/(8) \n\nc = (- 7 \pm √(49 + 80))/(8) \n\nc = (- 7 \pm √(129))/(8) \n\n$

Answer:

Option C

Step-by-step explanation:

Quadratic formula:

$4c^(2) +7c-5=0$

$a=4\nb=7\nx=-5$

$c=\frac{-b\frac{+}{} √(b^2-4ax)}{2a}$

$c=\frac{-7\frac{+}{}49-(4*4*-5) }{2*4}$

$c=\frac{-7\frac{+}{}√(129) }{8}$

hope this helps....

Use the steps to determine the exact value of sin(−135)°.

Identify the reference angle, θ.

θ =
°

Answers

To solve for sin(-135), the reference angle will be obtained as follow:
sin(-135)
=-sin(135)
=-sin(180-135)
=-sin 45
hence
the reference angle θ=45°

Answer:

The reference angle will be ${\theta}=45^(\circ)$

Step-by-step explanation:

To solve for $sin(-135)$ , the reference angle can be obtained as follows:

= $sin(-135)$

= $- sin(135)$ (Because $sin(-{\theta})=-sin{\theta}$ )

Thus, the above equation can be written as:

= $-sin(180-135)$

= $-sin45$

Hence, the reference angle will be ${\theta}=45^(\circ)$

A car company claims that its cars achieve an average gas mileage of at least 26 miles per gallon. A random sample of five cars form this company have an average gas mileage of 25.2 miles per gallon and a standard deviation of 1 mile per gallon. At α=0.06, can the company’s claim be supported, assuming this is a normally distributed data set?