2 years ago

A number to the 10th power divided by the same number to the 7th power equals 64. What is the number?

Mathematics

2 answers:

Naddik [55]2 years ago

4 0

X=4

Just trust me bro

WARRIOR [948]2 years ago

3 0

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scoundrel [369]

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Step-by-step explanation:

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2 years ago

Evaluate the value of x to 1 d.p<br><br><br> Thank you

Keith_Richards [23]

Answer:

value of x = 2.8

Step-by-step explanation:

By law of cosines,

${a}^{2} = {b}^{2} + {c}^{2} - 2 \times b \times c \times cos(100) \\ {x}^{2} = {13}^{2} + {10}^{2} - (2 \times 13 \times 10 \times cos100) \\ = 169 + 100 - 260 \times 0.862 \\ = 269 - 260 \times 0.862 \\ = 7.758 \\x = \sqrt{7.758 } \\ = 2.785 \\ = approx \: 2.8$