Which is a solution to (x − 2)(x + 10) = 13?
2 answers:
(x-2)(x+10)=13
Subtract 13 from both sides
x²+8x-20-13=13-13
x²+8x-33=0
Factorized
(x-3)(x+11)=0
Now set factors equal to 0
x-3=0 or x+11= 0
x=3 or x=-11
The answer is A
Good night :)
Answer: X=3
Step-by-step explanation:
1. expand the equation
x^2 + 10x -2x -20 = 13
2. Collect like terms
x^2 + 8x - 20 = 13
3. Simplify
x^2 + 8x = 13 + 20
x^2 + 8x = 33
x^2 = 33 - 8x
4. Substitute answers for guess and check
3^2 = 33 - (8 x 3)
9 = 33 - 24
This equation is correct therefore x = 3
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<span>number of gallons of gas, x
</span><span>total cost of the gas, y
</span>
3.75x <= 12
x <= 3.2
<span>The greatest amount of gas Berto can buy is 3.2 gallons</span>
Answer:
15 lbs total
1 canister - 3 lbs
lion has already consumed 9 pounds, "3 x 3 canisters of food"
15 - 9 = 6
6/3 = 2
the person needs to feed the lion 2 more canister
ANSWER IS 2
Step-by-step explanation:
