Ok so we have the first portion. We need to do cross multiplication first. So that would be 20(2x - 9) and 10(9)
So
20(2x - 9)=90
40x - 180=90
Then add 180 to itself then to 90
40x=270
X=6.75
Now let’s set the next one up knowing what we know from the previous one.
18(3x + 4)= 12(15)
54x + 72=180
Subtract 72 from it’s self and 180
54x=108
X=2
Answer:
-cos^4(x)
Step-by-step explanation:
Step 1: Use the Pythagorean identity : 1=cos^2(x) + sin^2(x)
1-sin^2(x) = cos^2(x)
-1+sin^2(x) = -cos^2(x)
cos^2(x) (-cos^2(x))
Step 2: Factor out common terms cos^2(x)
cos^2(x) (sin^2(x)-1)
Ans: -cos^4(x)
Answer:
T-shirts and Baseball Caps
Step-by-step explanation:
GIVEN: The ninth graders at a high school are raising money by selling T-shirts and baseball caps. The number of T-shirts sold was three times the number of caps. The profit they received for each T-shirt sold was , and the profit on each cap was .
TO FIND: If the students made a total profit of , how many T-shirts and how many caps were sold.
SOLUTION:
Let the total number of T-shirts sold are
Let the total number of Baseball Caps sold are
Profit received on each T-shirt
Profit received on each Baseball Caps
Total profit received on T-shirts
Total profit received on Baseball Caps
Also,
The number of T-shirts sold was three times the number of caps.
putting in equation,
Hence total t-shirts and baseball Caps were sold.
Answer:
42
Step-by-step explanation:
in order to find y, we need to find x.
180-65-62=53
x=53
we need to subtract 53-?=11
53-42=11
y=42
Answer:
x = -1
Step-by-step explanation:
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first divide 8 by 2, to get 3x-4 =x-6. then, add four on both sides to get 3x = x-6 + 4. to x's and number on different sides, you are now going to subtract 1x from both sides to get 2x = -6 + 4. solve to get 2x = -2. lastly, divide both sides by 2 do get <u>x = -1</u>
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