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Nana76 [90]
3 years ago
6

5. Solve the system of equations. 2x+3y=0 x-2y=-7 1-5y =

Mathematics
1 answer:
ra1l [238]3 years ago
6 0
-9 is the answer to this equation
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The ratio of girls to boys who participated in the geography bee was 5:4 there were 36 total students how many were boys
Simora [160]
There will be 20 boys in the class.
5 0
3 years ago
Solve the inequlity 2s+5s+12=132<br> A. s=-30<br> B. s=40<br> C. s=120<br> D. s=9
Korvikt [17]
First off, an inequality means that there is no equals sign... it will be either greater than (>) or less than (<). So we'll solve yours with the assumption that it is supposed to be greater than...

2s + 5s + 12 > 132
7s + 12 > 132
7s > 132 - 12
7s > 120
s > 120/7
s > 17 1/7

**If it was supposed to be less than instead of greater than, just change the sign. It doesn't affect the outcome.
4 0
3 years ago
Find the number of sides of a regular polygon if one interior angle is 120 degrees
nikitadnepr [17]

Answer:

Triangle(C)

Step-by-step explanation:

All the Exterior Angles of a polygon add up to 360°, so: each exterior angle must be 360°n (where n is the number of sides). So, 360n=120 ; n=360/120=3 It is a triangle.

6 0
3 years ago
Read 2 more answers
A class consists of 8 freshman and 22 sophomores.Freshman had an average of x points on a test,while sophomores had an average o
nirvana33 [79]

It's C because you need to find how many points each student earned per grade (freshman & sophomore). Then you multiply it by 30 to find out how many points each student scored in the whole class.

Hope this helps!

3 0
3 years ago
What is the factored form of the polynomial z² − 10z + 25?
qwelly [4]

Answer:

( z - 5 ) ( z - 5 )

Step-by-step explanation:

z² − 10z + 25

= z² − 5z - 5z + 25

= z ( z - 5 ) - 5 ( z - 5 )

= ( z - 5 ) ( z - 5 )

3 0
3 years ago
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