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Illusion [34]
3 years ago
14

Please solve by factoring 5x^2+7x-66=0...use a comma to seperate answers.

Mathematics
1 answer:
never [62]3 years ago
7 0
5x^2+7x-66=0 \\ \\5x^2+7x -22x+ 22x-66=0 \\ \\ 5x^2-15x+ 22x-66=0 \\ \\5x(x-3)+22(x-3)=0 \\ \\ (x-3)(5x+22)=0\\ \\x-3 = 0 \ \ or \ \ 5x+22 =0 \\ \\ x=3 \ \ or \ \ 5x=-22 \ \ /:5 \\ \\x=3 \ \ or \ \  x=-\frac{22}{5} \\ \\x=3 \ \ or \ \  x=-4\frac{2}{5}
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Jack's mother gave him 50 chocolates to give to his friends at his birthday party. He gave 3 chocolates to each of his friends a
pentagon [3]

Answer:

16 friends

Step-by-step explanation:

50 = 3x + 2

3x = 48

x = 16

16 friends

6 0
3 years ago
Simplify eight to the negative fifth divided by eight to the negative third.
Ber [7]
8^-5 / 8^-3

= (1/8^5 ) /  (1/8^3)
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3 0
3 years ago
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This is one thing in math I can't figure out.
Darya [45]

Answer:

12/9 and 4/3... Hit it in the calculator

5 0
3 years ago
Explain to Jimmy how estimating first can help him determine if his answer is reasonable his answer was 384 is at a reasonable a
goblinko [34]
Real answer
48
*26
------
1,248


Estimate
50
*25
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1,250

So the answer is..
Estimating is helpful because it makes sure you answered correctly. No, this answer is incorrect and if he had done the estimate he could have seen how he was wrong.
3 0
3 years ago
What is 5 x 7 - 12 + 56 - 9 ?
-BARSIC- [3]

Answer: 70

Step-by-step explanation:

5 multiplied by 7 is 35.

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23 + 56 is 79.

79 - 9 is 70.

4 0
3 years ago
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