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16 votes
GIVING BREAINLIEST

Evaluate.
(2.5−2/3)⋅(−4.2+5 2/5)

Enter your answer as a decimal or mixed number in simplest form in the box.

2 Answers

8 votes

Answer: 11/5

Explanation:


\left(2.5-(2)/(3)\right)\left(-4.2+5(2)/(5)\right)

Convert everything to a fraction or improper fraction:


=\left((5)/(2)-(2)/(3)\right)\left((21)/(5)+(27)/(5)\right)

= (11/6)(6/5)

= (11)(1/5) - Reduced with GCF of 6

= 11/5 or 2.2

User Rwitzel
by
4.4k points
10 votes

Answer:

2 1/5 or 2.2

Explanation:

(2.5−2/3)⋅(−4.2+5 2/5)

Convert decimals to fractions: (5/2 - 2/3) ⋅ (-21/5 + 5 2/5)

Convert mixed to improper fractions: (5/2 - 2/3) ⋅ (-21/5 + 27/5)

Make denominator the same in parentheses:

(15/6 - 4/6) ⋅ (-21/5 + 27/5)

Combine like terms: (11/6) ⋅ (6/5)

Multiply: (11 x 6) / (6 x 5) = 66/30

Divide numerator and denominator by HCF (6): 11/5

Write as mixed number: 2 1/5

or decimal: 2.2

User Paglian
by
4.6k points