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a_sh-v [17]
3 years ago
13

An A grade will be given to students having at least 450 total test points. There are two more tests to take before the semester

is over. Write and solve an equation to determine what score she needs to average on the next two tests if each question is worth 1 point?
Mathematics
1 answer:
Taya2010 [7]3 years ago
4 0
Let p represent her present test point total, and t represent the necessary average on the next two tests.
.. p +2t ≥ 450 . . . . she wants an A grade after the next two tests
.. t ≥ (450 -p)/2 . . . her required average on the next two tests
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Korvikt [17]

Answer:

32

Step-by-step explanation:

(2x+20)+3x=180\\5x+20=180\\5x=180-20=160\\x=160/5=32

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3 years ago
Find the measure of one interior angle for the following regular polygon
shusha [124]

Answer:

Step-by-step explanation:

I am assuming that by "interior" angle you do not mean the central angle.

This is a 10-sided polygon, a decagon. That means that there are 10 triangles that can extend from the center, with their sides being equal to the radii of the decagon. If we extract one of these triangles we can find what the interior angle is. The vertex angle measures 360/10 which is 36.

Split this triangle in half from the vertex to the base, creating a right triangle. The vertex angle is also split in half, making this angle (the vertex angle is the one at the top of the triangle) 18 degrees. We already know that one angle inside this right triangle is 90 (definition of a right triangle) and to find the other one, we apply the Triangle Angle-Sum Theorem:

180 - 18 - 90 = 72 degrees. That is the measure of the base angle that is NOT the right angle, obviously.

4 0
3 years ago
Solve -5sqrtx = -15.<br><br> A. x = -9<br> B. x = 7<br> C. x = 9<br> D. x = -7
labwork [276]

Check this attachment

3 0
3 years ago
Read 2 more answers
Need help on this on also plz
harina [27]
What is this? may I ask? did you mean to attach a photo?
4 0
4 years ago
Help please 100 points if you do
Artist 52 [7]
U scammer it only says 5 points not 100
3 0
3 years ago
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