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max2010maxim [7]
3 years ago
15

Graph the system of equation -9x + 3y = 27 8x + 8y =40

Mathematics
1 answer:
kirill [66]3 years ago
6 0
(-1, 6) is your answer
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A student of the author earned grades of 92, 83, 77, 84, and 82 on herfive regular tests. She earned grades of 88 on the final e
goblinko [34]

The class is weighted as follows:

60% Regular Tests

10% Final Exam

15% Project

15% Homework

The total weighted points possible for the class are as follows:

(100+100+100+100+100)*.6 + 100*.1 + 100*.15 + 100*.15 = 340

To calculate her individual final weighted grade we plug in her scores for each category and complete the following computation:

(92+83+77+84+82)*.6 + 88*.1 + 95*.15 + 77*.15 = 285.4

So her weighted grade percent would be 285.4/340 = 83.9% which is a B.

8 0
3 years ago
Which graph represents the circle given by the equation x + y - 4x + 9y -7 = 0?
PSYCHO15rus [73]

The graph of the circle equation is graph (d)

<h3>How to determine the circle?</h3>

The equation is given as:

x^2 + y^2 - 4x + 9y -7 = 0

Rewrite as:

x^2 - 4x + y^2 + 9y = 7

Express (x^2 - 4x) and (y^2 + 9y) as perfect squares.

So, we have:

(x - 2)^2 + (y + 3)^2 = 7 + 4 +  20.25

Evaluate the sum

(x - 2)^2 + (y + 3)^2 = 31.25

A circle equation is represented as:

(x - h)^2 + (y - k)^2 = r^2

Where

Center = (h, k)

Radius = r

So, we have:

(h, k) = (2, -3)

r^2 = 31.25

r = 5.5

The circle that has a center of (2, -3) and a radius of 5.5 is graph d

Hence, the graph of the circle equation is graph (d)

Read more about circle equation at:

brainly.com/question/1559324

#SPJ1

5 0
2 years ago
Use the proportion. What is 72% of 150
kherson [118]

Answer:

108

Step-by-step explanation:

150x0.72=108

4 0
3 years ago
Read 2 more answers
Find the product <br>(3a+3b)(3a-2b)
vitfil [10]

Answer:

9a^2 + 3ab + 6b^2

6 0
3 years ago
Simplify:<br> 6^20/6^5<br> please help me out and answer with the options given below:) ty
AURORKA [14]
C) 6^15

When you simply the fraction you get 6^15 or 470184984576.
3 0
3 years ago
Read 2 more answers
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