jgandarilla21

08.06.2021 • 

Mathematics

The seventh grade wants to break last year’s record of 78 coats collected for the annual clothing drive. They have already collected 13 coats. Part A
Which inequality represents the number of coats, c, that the seventh grade must still collect?
A. c + 78 ≥ 13
B. c + 78 ≤ 13
C. c + 13 ≥ 78
D. c + 13 ≤ 78
Part B
Which number line represents the graph of the solution to the inequality?
A. Number line runs from minus fifty to minus seventy five and extends both sides. The numbers minus fifty five, minus sixty, minus sixty five, and minus seventy are also marked in between. Straight line starts from the point minus sixty five and extends till minus seventy five and beyond.
B. Number line runs from fifty to seventy five. The numbers fifty five, sixty, sixty five, and seventy are also marked in between. Straight line starts from the point sixty five and extends till fifty and beyond.
C. Number line runs from minus fifty to minus seventy five and extends both sides. The numbers minus fifty five, minus sixty, minus sixty five, and minus seventy are also marked in between. Straight line starts from the point minus sixty five and extends till minus fifty and beyond.
D. Number line runs from fifty to seventy five. The numbers fifty five, sixty, sixty five, and seventy are also marked in between. Straight line starts from the point sixty five and extends till seventy five and beyond.

Ответ:

itsshyraa

06.04.2022

Mathematics

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I am assuming that since the triangle is named BNO, that N is the right angle.  The math works out if N is the right angle, B is the other base angle, and N is the vertex angle.  That means that "side" BO is actually the hypotenuse.  We are looking for the base length, BN.  55 degrees is the reference angle and sinde BN is adjacent to it, so along with that side and the hypotenuse, we will be using the cos ratio.  and 15000cos(55)=x. Solving for x we get x = 8603.6 or 8604 rounded.  First choice above.

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