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Stels [109]
3 years ago
8

Select all of the solutions of 4x2 - 36 = 0. If there are no solutions, select the empty set.

Mathematics
1 answer:
ruslelena [56]3 years ago
8 0

Answer:

<h2>-3 ;  3</h2>

Step-by-step explanation:

4x² - 36 = 0 ⇌ (2x)² - 6² = 0 ⇌ (2x - 6)(2x + 6) = 0 ⇌ 2x - 6 = 0 or 2x + 6 = 0

⇌ x = 3 or x = -3

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I need help on this it is a fraction subtract another fraction which is negative thx to whoever helps 5/7-(-1/7)
Sav [38]

Answer:

\frac{5}{7}-(-\frac{1}{7})=\frac{6}{7}

Step-by-step explanation:

To evaluate :

\frac{5}{7}-(-\frac{1}{7})

Solution:

Two negatives multiply to become a positive.

Thus, we can remove parenthesis by reversing the signs of the fraction by multiplying the negative outside.

⇒ \frac{5}{7}+\frac{1}{7}

Since the denominators are same for both fractions, so we simply add the numerators.

⇒ \frac{5+1}{7}

⇒ \frac{6}{7}  (Answer)

6 0
2 years ago
PLEASE HELP ME. I NEED HELP​
scoundrel [369]

#3). $124.16 will be in amount of deposit

#4) new balance, b = original balance + deposits - payments

=》 b =$782.14+$124.16 - ($450+$58.25)

=》 b = $398.05

3 0
3 years ago
How is adding and subtracting mixed numbers similar to adding and subtracting fractions? How is adding and subtracting mixed num
uranmaximum [27]
Step 1: Keep the denominator the same. Step 2: Add or subtract the numerators. Step 3: If the answer is an improper form, reduce the fraction into a mixed number. ... Step 1: Find the Lowest Common Multiple (LCM) between the denominators.

7/4 5/6
7+5=
7/5
1 2/5

8 0
3 years ago
sally has 20 coins in her piggy bannk, all dimes and quarters. the total amount of money is $3.05. how many of each coin does sh
VMariaS [17]
D=dimes
q=quarters

d + q = 20
.10d + .25q = 3.05

d=-q + 20

.10(-q + 20) +.25q = 3.05
-.10q + 2 + .25 = 3.05
.15q + 2 = 3.05
.15q + 2 - 2 = 3.05 - 2
.15q = 1.05
.15q/.15 = 1.05/.15
q = 7

d + 7 = 20
d + 7 - 7 = 20 - 7
d = 13

Sally has 7 quarters and 13 dimes.
Hope this helps!
5 0
3 years ago
The median of the set (n, n+5, n+6, n+9, n+15) is 9. What is the mean?
Simora [160]

Answer:

   =9.4

Step-by-step explanation:

The median  is the middle of the numbers when lined up from smallest to largest

(n, n+5, n+6, n+9, n+15)

The median is n+6

n+6 = 9

Subtract 6 from each side

n +6-6 = 9-6

n = 3

The numbers are

(n, n+5, n+6, n+9, n+15)

3, 8 ,9 ,12, 15

The mean is where you add up all the numbers and divide by the number of numbers

mean = (3+8+9+12+15) /5

         = (47)/5

         = 9 2/5

        =9.4

3 0
3 years ago
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