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3 years ago

The graph below shows the numbers of visitors at a museum over six days.

Mathematics

1 answer:

Bingel [31]3 years ago

5 0

Answer:

(a) 305 visitors (b): Saturday to Sunday

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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

The specific gravity of a substance is the ratio of its weight to the weight of an equal volume of water. Kerosene weighs 0.82 g

netineya [11]

Answer:

The specific gravity of kerosene is 0.82

Step-by-step explanation:

Let

x -----> the weight in grams of a cubic centimeter of Kerosene

y ----> the weight in grams of a cubic centimeter of water

z ---> the specific gravity of a substance

$z=\frac{x}{y}$

we have

$x=0.82\ g\\y=1\ g$

substitute the values

$z=\frac{0.82}{1}=0.82$

8 0

3 years ago

Read 2 more answers

Math problem time lol

Flura [38]

Answer:

314.2

Step-by-step explanation:

A = π r2

10x10 = 100

100 x 3.1416 (Only a little bit of pi)

314.15927

314.2

7 0

3 years ago

Read 2 more answers

Find the distance between -6 and 8. What is an expression that represents the distance?

snow_lady [41]

The answer is -6+x=8. x is the unknown number. To find the distance, try to use a number line. And the answer to the expression is 14. To get from -6 to 0, you add 6. Then from 0 to 8, you add 8. 8+6=14

6 0

3 years ago

Ron sold a total of 15 hotdogs and burgers he sold 3 more hotdogs then burgers. how many of each did he sell?

Hunter-Best [27]

burgers =x

hot dogs = x+3

x+x+3=15

2x+3=15

sub 3 from each side

2x=12

divide each side by 2

x=6

6 hamburgers

9 hamburgers

5 0

3 years ago