Solve the equation 9 = y + 4 Which step can you use to solve the equation 9 = y + 4 ?
1 answer:
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Answer:
≈ 56°
Step-by-step explanation:
Using the sine ratio in the right triangle
sin ? = =
, then
? = (
) ≈ 56° ( to the nearest degree )
We know that for every 5 red bricks there were 2 gray bricks.
The total amount of red bricks and grey bricks in this sample is 7.
5 red bricks + 2 grey bricks = 7 bricks
Now, we divide 175 "total number of bricks used" by 7 "5 red bricks + 2 grey bricks = 7 bricks" and we will get a quotient of 25.
Now we know that 25 bricks is of the wall. The gray bricks are
so we can multiply 25 by 2 and we will get a product of 50. If 1/7 = 25 grey bricks so 2/7 would be the grey bricks.
175 - 50 = number of red bricks.
Therefore, there were 125 red bricks.