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Vesna [10]
3 years ago
5

The square of a number exceeds the number by 72. Find the number

Mathematics
1 answer:
balu736 [363]3 years ago
8 0
X^2 = x + 72 you have a quadratic.
x^2 - x - 72 = 0
(x - 9)*(x + 8) = 0
x = 9 or x = - 8

We have to check this one. One of the answers could be wrong.
9^2 = 9 + 72
81 = 81 This one checks out and is OK.

(-8)^2 = -8 + 72
64 = - 8 + 72 
64 = 64.
Both answers work.
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Which is the equation of a line that has a slope of -2/3 ans passes through the point (-3, -1)
kupik [55]

Answer:

see explanation

Step-by-step explanation:

The equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

here m = - \frac{2}{3}, hence

y = - \frac{2}{3} x + c ← is the partial equation

To find c substitute (- 3, - 1) into the partial equation

- 1 = 2 + c ⇒ c = - 1 - 2 = - 3

y = - \frac{2}{3} x - 3 ← is the equation of the line

5 0
3 years ago
Help me with out this one thanks!
zavuch27 [327]

Answer:

9.5

Step-by-step explanation:

It keeps repeating the line goes all the way up then it keeps going to 9 then to 9.5 in the middle of 9 so it means its in between 10 so its 9.5 to 9 then 9.5 it repeats so mostly the answer is 9.5

hope i helped

please mark me as brainliest please

7 0
3 years ago
How do I simplify the n^-6*n^3 topic "Negative and Zero Exponents"
Alchen [17]
Since you’re multiplying n^-6 and n^3, you can add the exponents: -6+3 = -3

n^-6 * n^3 = n^-3

If you need to finish without having a negative exponent in your answer, then remember a negative exponent means that factor is on the wrong side of the fraction.

n^-3 = n^-3 / 1 = 1/n^3

when the factor moves to the other side of the fraction, the side of the exponent changes.
7 0
2 years ago
Ill mark brainliest I just don't understand
Misha Larkins [42]

Answer:

a triangle always equals 180 degrees so

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solve for x

and then plug it back into original equation

let me know if this makes sense

glad to help you more if needed

Step-by-step explanation:

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3 years ago
How can you use two-way tables to solve for probabilities?
Alona [7]

Answer:

A two-way table is a way to organise data about two specific variables. This example shows a two-way table where the variables are gender and favourite sport.

Step-by-step explanation:

8 0
2 years ago
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