Question

1. Simplify.

Answer 1

1. The "required option c) 45" is correct.

2. The value of 8 − 2⋅3 + 7 = 9

3. The required "option c) 45" is correct.

4. The required "option a) 40" is correct.

5. The value of $3^2-2.3+5$ = 8

Step-by-step explanation:

1. We have,

$5^2$ + 20

To find, the value of $5^2$ + 20 = ?

∴ $5^2$ + 20

= 5 × 5 + 20

= 25 + 20

= 45

Thus, the "required option c) 45" is correct.

2. We have,

8 − 2⋅3 + 7

To find, the value of 8 − 2⋅3 + 7 = ?

∴ 8 − 2⋅3 + 7

= 8 - 6 + 7

= 15 - 6

= 9

Thus, the value of 8 − 2⋅3 + 7 = 9

3. We have,

$6^2+3^2$

To find, the value of $6^2+3^2$ = ?

∴ $6^2+3^2$

= 6 × 6 + 3 × 3

= 36 + 9

= 45

Thus, the required "option c) 45" is correct.

4. We have,

$2^{3} +4.8$

To find, the value of $2^{3} +4.8$ = ?

∴ $2^{3} +4.8$

= 2 × 2 × 2 + 4 × 8

= 8 + 32

= 40

Thus, the value of $2^{3} +4.8$ = 40

Thus, the required "option a) 40" is correct.

5 . We have,

$3^2-2.3+5$

To find, the value of $3^2-2.3+5$ = ?

∴ $3^2-2.3+5$

= 3 × 3 - 2 × 3 + 5

= 9 - 6 + 5

= 14 - 6

= 8

Thus, the value of $3^2-2.3+5$ = 8