NGO has a collection of dimes and quarters with a total of $3.50. The number of dimes is 7 more than the number of quarters. How
1 answer:
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Answer:
Step-by-step explanation:
Possibilities (G for girls and B for boys):
GGG
GGB
GBG
<u>GBB </u>
BGG
<u>BGB </u>
<u>BBG </u>
BBB
ANSWER
B. The two middle coefficients add to the correct number but do not multiply to the correct number.
EXPLANATION
The given quadratic trinomial that Tina tries to factor is
Comparing to
we have a=10, b=-13 and c=-3
ac=-3×10=-30
We split the middle term so that their sum is -13.
Tina use
-10,-3
to get
-10x-3x
The sum is -13x alright but the product is not -30.
B is correct.