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Ksju [112]
3 years ago
9

What 76 rounded to the nearest 10

Mathematics
2 answers:
polet [3.4K]3 years ago
8 0
76 rounded to the nearest 10th is 80
if the number is a 5 or above in the second number it goes up to the next number with a 0 if its 4 or under is goes to the lower number with a 0
Kisachek [45]3 years ago
5 0
76 rounded to the nearest 10 is 80.

Since 6 is greater than 5, it rounds 7 to 8.
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Which of the following are perfect squares select all that apply
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Step-by-step explanation:

the perfect squares =

81, 121, 625

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What is the slope-intercept form of the function described by this table?
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As the name suggests, the slope-intercept form requires you to find the slope and the intercept. Slope-intercept form is y=mx+b

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4 0
2 years ago
What grade average is 79.2 out of 120​
mina [271]

Answer:

66%

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3 0
3 years ago
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Use the relationship between the angles in the figure to answer the question.
pickupchik [31]
67+52+x=180
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x=61
hope this helps!
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5 0
3 years ago
The sides of a right triangle have a relationship as depicted below, where x is the length of the longer leg in inches.
Ratling [72]
The equation to represent the area of the triangle would be:
y = 1/2(x²) - (7/2)x

The equation to represent the perimeter of the triangle would be:
y = 3x - 6

The solutions to the system would be (12, 30) or (1, -3).  The only viable solution is (12, 30).

Explanation
The area of a triangle is found using the formula
A = 1/2bh

For our triangle, b = x and h = x-7, so we have:
A = 1/2(x)(x-7)
A = 1/2(x²-7x)
A = 1/2(x²) - (7/2)x

We will replace A with y, so we have:
y = 1/2(x²) - (7/2)x

The perimeter of a triangle is found by adding together all sides, so we have:
P = (x-7) + x + (x+1)

Combining like terms we get:
P = 3x - 6

We will replace P with y, so we have:
y = 3x - 6

Since both equations have y isolated on one side, it will be easy to use substitution to solve the system:

3x - 6 = 1/2(x²) - (7/2)x

It's easier to work with whole numbers, so we will multiply everything by 2:
6x - 12 = x² - 7x

We want all of the variables on one side, so we will subtract 6x:
6x - 12 - 6x = x² - 7x - 6x
-12 = x² - 13x

When solving quadratics, we want the equation equal to 0, so we will add 12:
-12+12 = x² - 13x + 12
0 = x² - 13x + 12

This is easy to factor, as there are factors of 12 that sum to -13; -12(-1) = 12 and -12+-1 = -13:
0 = (x-12)(x-1)

Using the zero product property, we know that either x-12=0 or x-1=0; therefore x=12 or x=1.

Putting these back into our equation for perimeter (the simplest one) we have:
y = 3(12)-6 = 36-6 = 30; (12, 30);
y = 3(1) - 6 = 3 - 6 = -3; (1, -3)

We cannot have a negative perimeter, so the only viable solution is (12, 30).
8 0
2 years ago
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