Question

simplify the following
1.3^2+5^2
2.6^4/6^3
3.3^2(4^2)
4.7^4/4^2
5.4^2-3^3
6.1^4(-1)^6
7.7^2/4

Answer 1

Answer:

Example 5.7.1 :

Determine whether each of the following is a solution of x − 0.7 = 1.5: (a) x = 1 (b) x = −0.8 (c) x = 2.2

Solution

(a) x - 0.7 = 1.5

Substitute 1 for x.

1−0.7=?1.5(5.7.1)

Subtract.

0.3≠1.5(5.7.2)

Since x = 1 does not result in a true equation, 1 is not a solution to the equation.

(b) x - 0.7 = 1.5

Substitute −0.8 for x.

−0.8−0.7=?1.5(5.7.3)

Subtract.

−1.5≠1.5(5.7.4)

Since x = −0.8 does not result in a true equation, −0.8 is not a solution to the equation.

(c) x - 0.7 = 1.5

Substitute 2.2 for x.

2.2−0.7=?1.5(5.7.5)

Subtract.

1.5=1.5✓(5.7.6)

Since x = 2.2 results in a true equation, 2.2 is a solution to the equation.