I think its d as
300=br
280=dvd&br
But there's 320 ppl so 320-280=40
Answer:
3x
Step-by-step explanation:
9x - 5y = 29....when x = 1
9(1) - 5y = 29
9 - 5y = 29
-5y = 29 - 9
-5y = 20
y = 20/-5
y = -4 <==
Answer:
n = 75
Step-by-step explanation:
Step 1: Write equation
-n = -75
Step 2: Divide both sides by -1
n = 75
Step 3: Check
<em>Plug in n to verify it's a solution.</em>
-75 = -75
Answer: 
Step-by-step explanation:
f(x) = -3x² - 6x
<u>Requirements of the question</u>
Find the value of f(-9)
<u>Substitute values into the given function</u>
f(x) = -3x² - 6x
f(9) = -3 (-9)² - 6 (-9)
<u>Simplify the exponent</u>
f(9) = -3 (81) - 6 (-9)
<u>Simplify by multiplication</u>
f(-9) = (-243) - (-54)
<u>Simplify by subtraction</u>

Hope this helps!! :)
Please let me know if you have any questions