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Mathematics

1 answer:

Serhud [2]3 years ago

7 0

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lady runs 20 miles in 4 hours. write an equation representing the direct relationship between distance and time

sashaice [31]

D=rt
20=40t
divide by 20
t=2
d=10

8 0

3 years ago

Evaluate this equation: (7^6)⋅(7^−6)

Artyom0805 [142]

The answer is: " 1 " .
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Explanation:
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7⁶ * 7⁻⁶ = 7⁽⁶⁺⁽⁻⁶⁾⁾ = 7⁽⁶⁻⁶⁾ = 7⁰ = 1 . The answer is: "1" .
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Note the following properties of exponents:
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1) xᵃ * xᵇ = x⁽ᵃ⁺ᵇ⁾ ;

2) x⁰ = 1 ; (x ≠ 0) ;
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3 0

4 years ago

What is the value of x? sin55°=cosx Enter your answer in the box. x = °

rodikova [14]

ANSWER

x=35°

EXPLANATION

The sine and cosine ratio are complementary trigonometric ratios.

This means that:

sin(A)°=cos(90-A)°

The given equation is:

sin(55)°=cos(x).

This implies that,

x=90-55

x=35°

6 0

3 years ago

Gia spends 2/5 of her money on a shirt she then spends 4/9 of her remaining money on a pair of shoes what fraction of her money

Over [174]

5/5 will be a whole, when it comes to 5ths, since she spent 2/5 of her money, 5/5 - 2/5, she has left 3/5 of the whole then.

then she spent 4/9 of her 3/5 leftover, how much is 4/9 of 3/5? well, is just their product, $\bf \cfrac{4}{9}\cdot \cfrac{3}{5}\implies \cfrac{12}{45}\implies \cfrac{4}{15}$