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Papessa [141]
3 years ago
11

I WILL GIVE BRAINLIEST!

Mathematics
2 answers:
Nina [5.8K]3 years ago
8 0
40) D


41) A


42) B





good luck
Fantom [35]3 years ago
5 0
39.) His first score was 69. His second score was 71. That adds up to 140. If his mean is 72, what was his score on his 3rd try?
Okay so, 69 + 71 is 140. The total of his score will be 72 once divided by 3.
So if you make an equation to represent this it will be x/3 = 72
To figure this out you have to cancel out the 3 on the left side. You do this by multiplying by 3 on BOTH SIDES. Which gives you x/3*3 = 72*3
When you simplify it, it will give you x = 216. But this is ONLY GIVING YOU THE TOTAL OF THE THREE SCORES. Now you have to subtract 140 from 216 which gives you 76.
39.) D. 39


40.) I don't know how to solve this. I am sorry that I didn't find the answer.
41.) I don't know how to solve this. I am so sorry
42.) I don't know this one either. I am so so so so sorry


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Solve for x.
olga nikolaevna [1]

Answer:

\boxed{x=5},x=-9

Step-by-step explanation:

To rid the denominators, multiply both sides by (x-3)(x+1).

We get:

6(x+1)-12(x-3)=(x-3)(x+1)

Simplifying, we have:

6x+6-12x+36=x^2-3x+x-3,\\-6x+42=x^2-2x-3,\\x^2+4x-45=0

Solving, we get:

x^2+4x-45=0,\\(x-5)(x+9)=0,\\x=5,x=-9

Therefore, the solution with the greatest value is x=\boxed{5}

8 0
3 years ago
PLEASE HELP ME LINK IS BELOW
n200080 [17]

Answer:

55

Step-by-step explanation:

Since there is a right angle at the bottom, we know that x and angle 35 degrees form a right angle so 90 minus 35 is 55.

8 0
3 years ago
Read 2 more answers
the total number of living humans on arth was converted to scientific notation using an online caculation and was reported to be
gogolik [260]
7.158 * 10^9 rounds to 7 * 10^9
7 * 10^9 = 7,000,000,000
6 0
3 years ago
The ratio of girls to boys in the 6th grade is to 6to7 how many girls are there if there are 364total students
Rina8888 [55]

Answer:

168 girls.

Step-by-step explanation:

There are a total of 6 + 7 = 13 'parts'.

So one part = 364 / 13 = 28.

So the number of girls = 6 * 28

= 168.

4 0
3 years ago
How to solve x=6y-11 and 3x-2y=-1 by substitution
vagabundo [1.1K]
Substitute x into the second equation:
3(6y-11)-2y=-1
18y-33-2y=-1
16y=32
y=2
Then put the y value into the first equation to get x:
x=6(2)-11
x=1
There you go!

Please mark brainliest
7 0
3 years ago
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