3 years ago

Please help with this I need to get my math done!

Mathematics

1 answer:

azamat3 years ago

4 0

This answer would be A

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If angle x=55% and angle y=35, calculate the following 1.cos(x+y)

Setler79 [48]

Answer:

cos(X+Y) = cos(55+35) = cos(90) = 0

Step-by-step explanation:

cos(X+Y) = cosXcosY - sinXsinY

cos(55+35) = cos(55)cos(35) - sin(55)sin(35)

cos(55+35) = cos(55)cos(35) - cos(90-55)cos(90-35)

cos(55+35) = cos(55)cos(35) - cos(35)cos(55)

cos(55+35) = 0

cos(90) = 0

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3 years ago

Evaluate 18 divided 2a if a = 3

Andreas93 [3]

Answer:

Step-by-step explanation:

$\frac{18}{2a}$

a = 3

$\frac{18}{2(3)}$

multiply 2 and 3

2 * 3 = 6

$\frac{18}{6}$

simplify

18/6 = 3

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3 years ago

There are 75 students performing in the holiday concert. Of the students, 30 are boys. What percent of the students are boys?

viva [34]

Answer:

Total students = 75

Boys = 30

<h3>Percentage</h3>

$\sf \frac{30}{75} \times 100\% \\ \sf= \frac{10}{25} \times 100\% \\ \sf = \boxed{ \bold{ \red{40\%}}}$

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3 years ago

What the answer? 8x-(2x-3)=12

nevsk [136]

Answer:

x= 3/2 or 1.5

Step-by-step explanation:

First of all, you can take out the parenthesis because 8x is subtracting 2x-3.

8x-2x-3=12

6x-3=12

+3 +3

6x= 15

6x/6= 15/6

x= 3/2 or 1.5

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Step-by-step explanation:

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