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3 years ago

6

Tina spends 5/6 of an hour exercising every day. Today, she has already exercised for 3/5 of an hour. How much more time should

she spend exercising today in order to reach her daily goal?

1 answer:

zaharov [31]3 years ago

5 0

Answer: 14 minutes

Step-by-step explanation:

in the attachment

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14 a and b please !!!

leva [86]

14a

$\frac{2}{3x - 2c} + ( - ( \frac{3}{2x - 3c} )) = \frac{7}{2c}$

$\frac{2}{3x - 2c} - \frac{3}{3x - 2c} = \frac{7}{2c}$

$\frac{2 - 3}{3x - 2c} = \frac{7}{2c}$

$\frac{ - 1}{3x - 2c} = \frac{7}{2c}$

Next, cross-multiply.

$- 2c = 21x - 14c$

$12c = 21x$

$x = \frac{7}{4} c= 1 \frac{3}{4} c$

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3 years ago

What value of θ makes cosθ = sin70° a true statement?<br> A) 20° <br> B) 40° <br> C) 70° <br> D) 90°

Delvig [45]

Answer:

A) 20°

Step-by-step explanation:

Sine and cosine are co-function complements which means that value of sine of an angle is equal to the value of cosine of the complementary angles.

This can be represented by:

$\sin\theta=\cos(90\°-\theta)$

$\cos\theta=\sin(90\°-\theta)$

Given statement:

$cos\theta=\sin70\°$

Applying co-function complements

$\cos\theta=\sin(90\°-\theta)$

Since, we can represent 70° = 90°-20°

So

$\cos20\°=\sin(90\°-20\°)$

Thus, $\theta=20\°$ makes the statement true.

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Google is always a option.

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The sum of two whole numbers is 84, and their positive difference is 18.What are the two numbers? Please help

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Step-by-step explanation:

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