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katovenus [111]
4 years ago
5

How do you do 81x^2=49

Mathematics
1 answer:
NISA [10]4 years ago
4 0
81x^2=49\ \ \ \ /:81\\\\x^2=\frac{49}{81}\\\\x=\pm\sqrt\frac{49}{81}\\\\x=-\frac{7}{9}\ \vee\ x=\frac{7}{9}
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Sooo..... can anybody help.....
Margaret [11]
V= wlh so the answer is 56.25 or 56 1/4
4 0
3 years ago
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The sum of 4 consecutive numbers is equal to the sum of the next 3 consecutive numbers. Find the largest number.​
timurjin [86]

Answer:

The answer is: The largest number is 15.

Step-by-step explanation:

Let n = the number

n + (n + 1) + (n + 2) + (n + 3) = (n + 4) + (n + 5) + (n + 6)

4n + 6 = 3n + 15

n = 9

Proof:

9 + 10 + 11 + 12 = 19 + 23 = 42

13 + 14 + 15 = 27 + 15 = 42

Hope this helps! Have an Awesome Day!!  :-)

6 0
4 years ago
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Express the following numbers as a ratio between an integer and a natural number.
Julli [10]

Answer:

Step-by-step explanation:

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b)36/1,-45/1,21/5, -4/5, 91/6,-2/9

5 0
3 years ago
Solve for y in the equation:<br> y over 5 = -15
nikdorinn [45]

Answer:

y = -75

Step-by-step explanation:

Simplify both sides of equation

1/5y = -15

multiply both side by 5

1/5y * 5 = -15 * 5

y = -75

8 0
3 years ago
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What is 1/4 plus 1/3, will give brainliest and thank you and rate and give 15 points plz help
Slav-nsk [51]
First, you have to convert 1/4 and 1/3 to have the same denominator. 

So, 1/4 x 3 = 3/12. 1/3 x 4 = 4/12.

Now, you can add 3/12 + 4/12 = 7/12.
4 0
3 years ago
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