3 years ago

Find the unknown factor 7×(2×_)=56

Mathematics

2 answers:

Yuri [45]3 years ago

7 0

The answer is 4 because 2 * 4 = 8 * 7 = 56

tensa zangetsu [6.8K]3 years ago

7 0

Answer is 69 hjlhljl

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2 years ago

Evaluate 7C3 OA) 25 O B) 45 OC) 35 OD) 20

SpyIntel [72]

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Step-by-step explanation:

$^7C_3 \\ = \frac{7!}{3!(7 - 3)!} \\= \frac{7!}{3! \: 4!} \\ = \frac{7 \times 6 \times 5 \times 4!}{3 \times 2 \times 1 \times 4!} \\ = \frac{7 \times 6 \times 5 \times 4!}{3 \times 2 \times 1 \times 4!} \\ = 35 \\ \huge \red{ \boxed{ \therefore \: ^7C_3 = 35}}$