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Rama09 [41]
2 years ago
7

4. Find the value of the expression below for r=4 and t=2.

Mathematics
2 answers:
cestrela7 [59]2 years ago
7 0

Answer:

(a) 9

Step-by-step explanation:

r = 4; t = 2

t³ - r + 20 ÷ r =

= 2³ - 4 + 20 ÷ 2

Order of operations says do the exponent first.

= 2 × 2 × 2 - 4 + 20 ÷ 4

Now do the multiplications and the division.

= 8 - 4 + 5

Do the subtraction.

= 4 + 5

Add.

= 9

Katen [24]2 years ago
5 0

Answer:

(a) 9

Step-by-step explanation:

\sf t^3 - r + 20 \div  r

substitute r = 4, t = 2

\sf (2)^3 - 4 + 20 \div 4

simplify

\sf (2)^3 - 4 + 5

cubic of 2 is 8

\sf 8 - 4 + 5

simplify

\sf 9

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