Four more than seven times a numbetis the same as twenty less than three times the number

The Number is: 1.6

Step-by-step explanation:

Let n = the number.

Seven times the number plus four equals twenty minus three times the number:

7n + 4 = 20 - 3n

10n = 16

n = 1.6, the number is 1.6

Proof:

7(1.6) + 4 = 20 - 3(1.6)

11.2 + 4 = 20 - 4.8

15.2 = 15.2

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the equation cos(35) =a/25 can be used to find the length of bc what is the length of bc? round to the nearest tenth

step-by-step explanation:

according to the triangle sum theorem, all the angles in a triangle must add up to 180 degrees. if we know one angle is already 90, we do 180-90=90. the other 2 angles must add up to 90, exactly.

step-by-step explanation: