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Nikitich [7]
2 years ago
8

Cassie has test grades of 71, 78 and 83 on the first three tests in her

Mathematics
2 answers:
Neporo4naja [7]2 years ago
3 0

Answer:

x ≥ 88

Step-by-step explanation:

In order to have at least an average of 80 after 4 tests, the sum of her scores must be at least 80 * 4 = 320 so we can write the following inequality:

71 + 78 + 83 + x ≥ 320

232 + x ≥ 320

x ≥ 88

Sphinxa [80]2 years ago
3 0

Answer:

Your correct answer to this problem is x ≥ 88

Step-by-step explanation:

71 + 78 + 83 + x ≥ 320

232 + x ≥ 320

= x ≥ 88

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Given the equation -5x+2y=-10 what is the equation of the line perpendicular to the line?
meriva

Answer:

The equation of the perpendicular line would be y = -2/5x - 1

Step-by-step explanation:

In order to find this line, we must first find the slope of the original line. We do this by solving for y.

-5x + 2y = -10

2y = 5x - 10

y = 5/2x - 5

This shows us a slope of 5/2. TO find the perpendicular slope, we use the opposite and reciprocal. This means we negative 5/2 to get -5/2 and then we flip it to get -2/5. Now that we have this, we can use the slope and the point in point-slope form to get the equation.

y - y1 = m(x - x1)

y - 1 = -2/5(x + 5)

y - 1 = -2/5x - 2

y = -2/5x - 1

4 0
2 years ago
Given the formula y = mx + b, what is the slope of a line, m, if x = 5, y = 7, and b =10?
anygoal [31]
The answer is:
C. The slope -3/5
Because -3/5 times 5 is -3 and when you combine -3 and 10 the answer is 7 and 7=7 (the y)
3 0
2 years ago
Find the area of this circle please…Use 3 for pi
ZanzabumX [31]

Given:

The radius of circle is 11 inch

The value for pi is 3

The objective is to find the area of the circle.

The area of the circle is given by the formula:

A=\pi\times r^2^{}

Substituting ,r = 11

\pi=3

We get:

\begin{gathered} A=\pi\times r^2 \\ =3\times(11)^2 \\ =3\times121 \\ =363 \end{gathered}

Hence, the area of the circle is 363 square inches

5 0
1 year ago
A factory can produce 3,120 cars in a week. Which beat estimate of how many cars the factory can produce in 4 weeks. Please Help
musickatia [10]

3120 times 4 which is 12,480 which is close to 1200 so c is ur answer

3 0
2 years ago
Read 2 more answers
Apply the commutative property to 13 × 7 × 21 to rearrange the terms and still get the same solution. 
Andru [333]
Hey there!!
The answer is (13)(21)(7).

Hope this is what ur looking for.

~ TRUE BOSS
7 0
3 years ago
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