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DENIUS [597]
3 years ago
13

For five mathematics tests, your scores were 81, 86, 81, 76, 71. what was your average score?

Mathematics
1 answer:
trasher [3.6K]3 years ago
7 0

add them together then divide by 5

81 +86 +81 +76 +71 = 395

395/5 = 79

 your average was 79

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If p= 6-2y, work out p when y=-5
Blizzard [7]
You should change the y by the number given
P=6-2*-5
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2 years ago
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what happens to the line if you change the slope a)if y = 2x + 3 and change it to y = 3x + 3 b)if you change the 2 to -2
Sidana [21]
I am pretty shur answer is a
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3 years ago
consider the function f(x) = x2 2x – 15. what are the x-intercepts of the function? left-most x-intercept: ( , 0) right-most x-i
eimsori [14]

we have

f(x)=x^{2} +2x-15

we know that

The x-intercept is the value of x when the value of the function is equal to zero

so

in this problem

Find the roots of the function

equate the function to zero

x^{2} +2x-15=0

Group terms that contain the same variable, and move the constant to the opposite side of the equation

x^{2} +2x=15

Complete the square. Remember to balance the equation by adding the same constants to each side

x^{2} +2x+1=15+1

x^{2} +2x+1=16

Rewrite as perfect squares

(x+1)^{2}=16

Square root both sides

(x+1)=(+/-)\sqrt{16}

(x+1)=(+/-)4

x=-1(+/-)4

x1=-1+4=3

x2=-1-4=-5

x^{2} +2x-15=(x-3)(x+5)

therefore

<u>the answer is</u>

the x-intercepts are the points (3,0) and (-5,0)

3 0
3 years ago
Read 2 more answers
Y
meriva

Answer:

67.38

Step-by-step explanation:

SinX=opp/hyp

Angles then arcsin

7 0
2 years ago
Solve x^2+ 4x =15<br> thxssss
dmitriy555 [2]

Answer:

x=3/5

Step-by-step explanation:

x^2+4x=5

x+4x=5x

5x+2=5

-2 -2

5x=3

divide 5 from each side

5/5x=3/5

<u>x=3/5</u>

7 0
3 years ago
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