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3 years ago

10

On a class test, Lesley scored 4.5 points more than her friend Cathy. Lesley scored 81.5 points. Cathy's score, x, can be found

using the equation below.
x+4.5=81.5

1 answer:

Helga [31]3 years ago

7 0

81.5-4.5 will equal your answer!

this is because x and 4.5 would equal 81.5, meaning if you subtract— you’ll get your X

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Wewaii [24]

Answer:

the answer to the question is 1

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2 years ago

Using addition formula solve tan 15

salantis [7]

Answer:

2 - $\sqrt{3}$

Step-by-step explanation:

Using the addition formula for tangent

tan(A - B) = $\frac{tanA-tanB}{1+tanAtanB}$ and the exact values

tan45° = 1 , tan60° = $\sqrt{3}$ , then

tan15° = tan(60 - 45)°

tan(60 - 45)°

= $\frac{tan60-tan45}{1+tan60tan45}$

= $\frac{\sqrt{3}-1 }{1+\sqrt{3} }$

Rationalise the denominator by multiplying numerator/ denominator by the conjugate of the denominator.

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= $\frac{(\sqrt{3}-1)(1-\sqrt{3}) }{(1+\sqrt{3})(1-\sqrt{3}) }$ ← expand numerator/denominator using FOIL

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= $\frac{-4}{-2}$ + $\frac{2\sqrt{3} }{-2}$

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3 years ago

6. cory gets paid every two weeks. he works 40 hours per week at $7.75 per hour. cory has the following deductions: 8% for medic

aliya0001 [1]

Answer: 429.88

Step-by-step explanation:

The first 40 hours is at 9.50

40 *9.50 =380

The remaining hours is at 9.50 * 1.5 or 14.25

43.5 -40 = 3.5

3.5 * 14.25

49.875 = 49.88 ( rounding to the nearest cent)

Add together

380+49.88 =429.88

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3 years ago

Read 2 more answers

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lilavasa [31]

We will use the Sine Law:
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3 years ago

What is the distance between points (-2, 8) and (6, -2)? Round to the nearest tenth of a unit.

Mama L [17]

So you will have to find the difference between each number so 6--2=8
and 8--2=10. So then I'm guessing you have to round 8 to 10. Sorry if this isn't all correct.

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4 years ago