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aleksandrvk [35]
3 years ago
9

What is the sum of x2-3x+7 and 3x2+5x-9

Mathematics
1 answer:
Ghella [55]3 years ago
5 0
(x² - 3x + 7) + (3x² + 5x - 9)
(x² + 3x²) + (-3x + 5x) + (7 - 9)
4x² + 2x - 2
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What is the solution to this equation? √x=7 A. x=√ 49 B. x=√7 C.x=14 D. x= 49
IgorLugansk [536]
Let's not look at the option and try to solve it.
√x=7
Let's look at this. Square roots are the number that is multiplied by itself to make that number. For example, 2 is the square root of 4, 3 is the square root of 9.
We need to multiply 7 by itself to find x.
7×7=49
So, D. =49.

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3 years ago
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6 0
4 years ago
Which of the following numbers is closest to 7?
Sphinxa [80]

Answer:

B. √50

Step-by-step explanation:

7^{2} is 49 so √49 is 7

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since the <u>closest number to 49 is 50</u>, that is the answer.

7 0
3 years ago
A muffin recipe calls for 2/5 tablespoons of vanilla extract for 6 muffins. Arthur is making 18 muffins. How much vanilla extrac
GuDViN [60]
2/5 tablespoons of vanilla extract ... 6 muffins
x tablespoons of vanilla extract = ? ... 18 muffins

If you would like to know how much vanilla extract does he need, you can calculate this using the following steps:

x * 6 = 18 * 2/5
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x = 36/5 / 6
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Result: Arthur will need 1 1/5 tablespoons of vanilla extract for 18 muffins.
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