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3 years ago

15

You have a handful of quarters, nickels, and dimes that totals 75 cents. Make a table listing all the possible combinations. How

many ways,

1 answer:

RSB [31]3 years ago

7 0

2 quarters 2 dimes and 1 nickel

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The perimeter of a triangle is 17 inches. One side is 5 inches, and another is 4 inches. What is the length of the third side?

notsponge [240]

Answer:

8inches

Step-by-step explanation:

Length of the third side = perimeter - ( side1 + side2 )

= 17 - (5+4)

= 17 - 9

= 8 inches

7 0

2 years ago

Find the length of the missing side

OLga [1]

a^2+b^2=c^2

a^2+24^2=25^2

a^2+576=625

a^2=49

a=7

The answer is 7.

4 0

2 years ago

Read 2 more answers

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.

The conjugate of 1 + $\sqrt{3}$ is 1 - $\sqrt{3}$

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

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

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

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

= 2 - $\sqrt{3}$

3 0

2 years ago

Please help pleaseeeeeee

marysya [2.9K]

Answer:

B

Step-by-step explanation:

it's basically 2+7

3 0

2 years ago

Read 2 more answers

How to find the perimeter and area

Ad libitum [116K]

For Perimeter you add all the sides of the figure and the total is your perimeter. For Area you multiply the length times the width.

3 0

2 years ago