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Umnica [9.8K]
3 years ago
6

Divide. Express your answer in lowest terms. - 7/10 divide by (- 4/5)

Mathematics
2 answers:
strojnjashka [21]3 years ago
8 0
- \frac{7}{10} \div (- \frac{4}{5} ) \\ \\ - \frac{7}{10} \div - \frac{4}{5} \\ \\ - \frac{7}{10} \times \frac{5}{-4} \\ \\ \frac{7}{10} \times \frac{5}{4} \\ \\ \frac{7 \times 5}{10 \times 4} \\ \\ \frac{35}{10 \times 4} \\ \\ \frac{35}{40} \\ \\ \frac{7}{8} \\ \\ Answer: \fbox {7/8} \ or \ \fbox {0.875}
Aleonysh [2.5K]3 years ago
7 0
-7/10 ÷ (-4/5)

First, we need to do KCF

Keep the first fraction.

-7/10

Change the sign.

-7/10 *

Flip the fraction

-7/10 * (-5/4)

Now multiply!

7*5 = 35
4*10 = 40

Now, simplify

35/5 = 7
40/5 = 8

Final answer: 7/8

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Find the number of real number solutions for the equation. x2 + 5x + 7 = 0 0 2 1 cannot be determined
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Answer:

0 solution

Step-by-step explanation:

Given

x^2 + 5x+ 7 = 0

Required

Find number of solutions;

The number of solutions can be determined via the value of determinants, D;

Such that

D = {b^2} - {4ac}

By comparing the general form of equation;

ax^2 +bc x + c = 0

with x^2 + 5x+ 7 = 0

This gives

a = 1\\b = 5\\c = 7

So;

D = {b^2} - {4ac} becomes

D = {5^2} - {4*1*7}

D = {25} - {28}

D = -3

The calculated value of D is less than 0;

This implies that x^2 + 5x+ 7 = 0 has no real solution

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3 years ago
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Hope this helps!
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3 years ago
Which of the binomials below is a factor of this trinomial? 6x2 - 6x - 72
vova2212 [387]
Just factor to find the roots 

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<span>B: x - 4</span>
3 0
3 years ago
Read 2 more answers
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