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NISA [10]
3 years ago
5

CAN SOMEONE HELP PLEASEEEEEE!!!!!!

Mathematics
1 answer:
sukhopar [10]3 years ago
6 0

Answer: What the f

Step-by-step explanation:

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Evaluate 3x² - 4xy + 2y² - 1 for x = - 3 and y = 5
zhannawk [14.2K]

Answer:

3x^{2} - 4xy + 2y { }^{2} - 1  \\ 3 \times ( - 3) { }^{2}  - 4 \times ( - 3)  \times 5 + 2 \times 5 {}^{2} - 1 \\ (3 \times 9) - ( - 60) + 50 - 1 \\ 27 + 60 + 50 - 1 \\ 165

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1 year ago
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A blood bank needs 7 people to help with a blood drive. 17 people have volunteered. Find how many different groups of 7 can be f
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3 years ago
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Simplify the following fraction (9/16/1/4)-1/5
german

Answer: \frac{41}{20}

Step-by-step explanation:

The first step is to make the division of the fractions \frac{9}{16} and

\frac{1}{4}. To do this, you can flip the fraction \frac{1}{4} over and multiply the numerators and the denominators of the fractions. Then:

(\frac{\frac{9}{16}}{\frac{1}{4}})-\frac{1}{5}=(\frac{9}{16}*4)-\frac{1}{5}=\frac{36}{16}-\frac{1}{5}

Reduce the fraction \frac{36}{16}:

 =\frac{9}{4}-\frac{1}{5}

Now you can make the subtraction:  in this case the Least Common Denominator (LCD) will be the multiplication of the denominators.   Divide each denominator by the LCD and multiply this quotient by the corresponding numerator and then subtract the products. Therefore you get:

=\frac{45-4}{20}=\frac{41}{20}

6 0
3 years ago
If MN = x+4 and DE = 3x-2, find x. (More info in pic)
algol [13]

Answer:  D) 10

============================================================

Explanation:

I'm assuming points M and N are midpoints of segments FD and FE respectively. If that's the case, then segment DE is twice as long compared to segment MN. We consider MN to be a midsegment.

So,

DE = 2*(MN)

3x-2 = 2*(x+4)

3x-2 = 2x+8

3x-2x = 8+2

x = 10

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3 years ago
Seven - twelfths of a new dress has been sewn. Chelsea did 3/7 of the sewing. How much of the dress did Chelsea sew?
galina1969 [7]
1/4, because 7/12×3/7=1/4
7 0
4 years ago
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