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3 years ago

PLZ HELP QUICK

Mathematics

1 answer:

amid [387]3 years ago

3 0

just factorise it so the answer will be (3x+2)(x-4)

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In triangle abc, cos A= -0.6. Find A and Tan A

Tresset [83]

Answer:

Part 1) $A=126.87^o$

Part 2) $tan(A)=-\frac{4}{3}$

Step-by-step explanation:

we have

$cos(A)=-0.6$

The cos(A) is negative, that means that the angle A in the triangle ABC is an obtuse angle and the value of the sin(A) is positive

The angle A lie on the II Quadrant

step 1

Find the measure of angle A

$cos(A)=-0.6$

using a calculator

$A=cos^{-1}(-0.6)=126.87^o$

step 2

Find the sin(A)

we know that

$sin^2(A)+cos^2(A)=1$

substitute the value of cos(A)

$sin^2(A)+(-0.6)^2=1$

$sin^2(A)=1-0.36$

$sin^2(A)=0.64$

$sin(A)=0.8$

step 3

Find tan(A)

we know that

$tan(A)=\frac{sin(A)}{cos(A)}$

substitute the values

$tan(A)=\frac{0.8}{-0.6}$

Simplify

$tan(A)=-\frac{4}{3}$

5 0

3 years ago

Kevin is 3 times as old as Daniel. 4 years ago, Kevin was 5 times as old as Daniel.

DochEvi [55]

X is Kevin; Y is Dan

X = 3Y

X - 4 = 5(Y - 4)

3Y - 4 = 5(Y - 4)
3Y - 4 = 5Y - 20
   + 4 +4
4 cancels each other out.
3Y = 5Y - 16
   - 5 -5
5 cancels each other out.
-2Y = -16
/2 /2
   Y = 8

X = 3Y;
X = 3 x 8;

Thus,
X = 24;
Kevin(x) is 24

8 0

4 years ago

a subway car passes 4 stations every 10 minutes. at this rate, how many stations will it pass in 2 hours?

mars1129 [50]

The subway car passes through 48 stations in 2hours

It is given that a subway car passes 4 stations every 10 mins.

Subway car is being referred to the metro system of New York city

It is known to us that an hour has 60 mins

We are given that subway car passes 4 stations every 10 mins

Therefore number of stations passed by subway car in 1 hour

= 60/10 x 4 = 24 stations

We are required to find the number of stations crossed by subway car in 2 hours

Therefore, number of stations crossed by subway car in 2 hours= 24 x 2

= 48 stations

Therefore, the subway car passes 48 stations in 2 hours

For further reference:

brainly.com/question/5451948?referrer=searchResults

#SPJ9

3 0

1 year ago

Each day a company delivers newspaper to the town of wayland. It has 158 customer on the north side of town, 378 customers on th

Sveta_85 [38]

Answer:

127

Step-by-step explanation:

Given that a company delivers newspaper to the town of wayland. It has 158 customer on the north side of town, 378 customers on the west side, 237 customers on the south side

It does not depend on the side of the town

For the total town the total number of customer's = number of customer's is north side + the number of customer's in west side + number of customer's in south side

Total number of customer's = 158 + 378 + 237 = 773

Given that the company received a total number of 900 newspaper's

The number of newspaper left over = total number of newspaper's received - total number of customer's = 900-773 = 127

Therefore the total number of newspaper left over are 127

3 0

4 years ago

There are 32 puppies and 48 kittens at the adoption center. What is the ratio of puppies to kittens?

Karolina [17]

I think the answer might be 32:48. Because It is just asking for a ratio and nothing else.

7 0

4 years ago