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3 years ago

PLEASE HELP!!! GIVING AWAY BRAINLIEST AND 20 POINTS!!!!!!!!!!!!!!!!!

Mathematics

1 answer:

ludmilkaskok [199]3 years ago

8 0

Answer:

X = 2 and Y = 3

Step-by-step explanation:

3(2) = 6

4(3)= 12

12 + 6 = 18

Hope I helped. Mark as Brailiest please ^-^

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If your car goes 50 kilometers in 2 hours,what is its average speed

Georgia [21]

Answer:

25 kilometers per hour

Step-by-step explanation:

I just simply made it into a proportion of 50/2=x/1 and 50 divided by 2 is 25. hopefully that help you.

8 0

3 years ago

Find the value of tan theta if sin theta = 12/13 and theta is in quadrant 2

8090 [49]

Answer:

tanΘ = - $\frac{12}{5}$

Step-by-step explanation:

Using the trigonometric identities

• sin²x + cos²x = 1, hence

cosx = ± √(1 - sin²x )

• tanx = $\frac{sinx}{cosx}$

given sinΘ = $\frac{12}{13}$ , then

cosΘ = ± $\sqrt{1-(12/13)^2}$

Since Θ is in the second quadrant where cosΘ < 0, then

cosΘ = - $\sqrt{1-\frac{144}{169} }$

= - $\sqrt{\frac{25}{169} }$ = - $\frac{5}{13}$

tanΘ = $\frac{\frac{12}{13} }{\frac{-5}{13} }$

= $\frac{12}{13}$ × - $\frac{13}{5}$ = - $\frac{12}{5}$

5 0

3 years ago

Hi can someone help me with this

WINSTONCH [101]

Answer:

86 degrees

Step-by-step explanation:

180 - (74 + 20) = 86

5 0

3 years ago

What does sec 2pi equal?

Vikentia [17]

Secant is the same as 1/cos so you can just write it as 1/2pi then you can put that into your calculator as 1/cos(2pi) and it equals 1.

6 0

3 years ago

Solve the proportion.

Lostsunrise [7]

Answer:

r = 9

Step-by-step explanation:

cross multiply

9 * r = 81

9r = 81

divide both sides by 9

r= 81/9

r = 9

8 0

3 years ago