It’s D bc Dt= 15x3 and it’s not that hard to solve
42 because x is equal to its corresponding side
Answer:
21. 123 22. 6.86 or 6/ 6/7 23. 90
Step-by-step explanation:
21. (6+4)² + (22+10÷2)
(10)² + (22 + 5)
100 + 27
127
22. (11+42-5) ÷ (11-4)
48 ÷ 7
6.85 or 6 6/7
23. (17-3) × (14 - 6) -22
14 × 8 - 22
112 - 22
90
Answer:

Step-by-step explanation:

We'll use rule of exponents to simplify expression.

Now, use the commutative property of multiplication.

In order to multiply power of the same base, we add their exponents.

→ Add exponents:

→ Multiply 3* -8

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Subtract 17from both sides
32-17=x
Simplify 32-17 to 15
X=15