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4. x = 17

2. x = 77; y = 103

Step-by-step explanation:

4. The acute angles of a right triangle are complementary.

2x + 3x + 5 = 90

5x = 85

x = 17

2.

Same side interior angles are supplementary.

x + 103 = 180

x = 77

y and 103-deg angle are vertical angles, so they are congruent.

y = 103

b

step-by-step explanation:

this is the formula: v = the value of investment at the end of the time period

p = the principal amount (the initial amount invested)

r = the annual interest rate

n = the annual frequency of compounding (how many times a year interest is added)

t = the number of years the money is invested

^ means raise to the power of