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djverab [1.8K]
3 years ago
5

Mr. Martin’s math test, which is worth 100 points, has 35 problems. Each problem is worth either 5 points or 2 points.

Mathematics
1 answer:
makkiz [27]3 years ago
6 0

Answer:

A

Step-by-step explanation:

a = 10 X 5 = 50, 25 X 2 = 50 = 100

B = 15x5 = 75, 20 x 2 = 40, = 105

C = 20 x 5 = 100, already at 100 (so immediately wrong)

D: 25 x 5 = 125, already larger than 100 (so immediately wrong)

Therefore A is the only correct option, hop i helped you!

(could you mark me brainliest if possible thanks!)

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The given matrix equation is,

1.5\left[\begin{array}{cc}x&6\\8&4\end{array}\right] +y\left[\begin{array}{cc}1&4\\3&2\end{array}\right] =\left[\begin{array}{cc}z&z\\6z&2\end{array}\right].

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\left[\begin{array}{cc}1.5x&9\\12&6\end{array}\right] +\left[\begin{array}{cc}y&4y\\3y&2y\end{array}\right] =\left[\begin{array}{cc}z&z\\6z&2\end{array}\right]  \\

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\left[\begin{array}{cc}1.5x+y&9+4y\\12+3y&6+2y\end{array}\right]  =\left[\begin{array}{cc}z&z\\6z&2\end{array}\right]  \\

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