MATHEMATICS HIGH SCHOOL

Find the measure of angle A

Answers

Answer 1

Answer:

Answer:

21 degrees

Step-by-step explanation:

Triangles have a total angle of 180 degrees.

This makes our equation:

3x+3+4x+135=180

Subtract 135 from both sides and combine like terms

7x + 3 = 45

Subtract 3 from both sides

7x = 42

Divide both sides by 7

x = 6

Plugging the number in:

3x + 3 =

3(6) + 3 =

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The measure of one of the acute angles in a right triangle is 63.7º. what is the measure of the other acute angle? 26.3º 76.3º 116.3º 66.3º

Answers

the correct answer is a. 26.3

16 men are employed to do a work in 20 days. at the end of 12 days the work is only half done. how many additional number of men should be employed to complete the work in the stipulated time?

Answers

16 men in 12 days can do 0.5work
1 man 1 day can do 0.5/(16x12) of a work

8days to do 0.5 of a work
1 man 8 days can do 8x0.5/(16x12) = 0.5x(1/24) of a work
... if you notice we need 24 men

... more detail
in8days, 0.5x(1/24) of a work need 1 man
in8days, 0.5 of a work need 0.5/(0.5x(1/24)) = 24 men

point is to find 'amount of work done per man per unit of time' then work out from that.

HELP ASAP!!
given the function f (x)=2x-5 over 3 , which of the below expressions is correct ?

Answers

hey :)
the answer is the third one

I hope this helps you

y=2x-5/3

3y=2x-5

3y+5=2x

x=3y+5/2

f^-1 (x)=3x+5/2

The resale value of a textbook decreases by 25% with each previous owner. A new textbook is sold for $85. Which function represents the resale value of the textbook after x owners?

Answers

Since the value decreases by 25% each time, the next cost is the current cost times 0.75 (since new cost is 75% of current cost).
To find the value of the book after x times sold, you can use:
$cost = 85(0.75)^x$
Just plug in the number of times it is resold to find the value.

A exponential function would represent it nicely f(x)=b*a^x
Reason being a decrease of %
a = 1+r
r = -25% = -0.25
And b being what the original cost of the book
f(x)=85*0.75^x
Where f(x) is the price after x amount of previous owners

How do you solve 4x^2-12x=7 algebraically

Answers

(if you don't wanna read all this the answer is at the bottom btw)

move the 7 over to equate the equation to 0

4x^2 - 12x -7 = 0

(ok now you have a (4), b (-12), and c (-7) here you can either use the quadratic formula to solve it or factor the equation)

to factor it, you have to multiply a and c (4*-7 = -28) and find two numbers that multiply to -28 and add to -12

the numbers are -14 and 2. sub those into the equation in place of b

4x^2 + 2x - 14x - 7 = 0

find the lcd of the first two terms and the last two terms to factor them

2x(2x + 1) - 7(2x+1) = 0
(2x -7) (2x+1) = 0
(x-7/2)(x+1/2) = 0

to find the two x values you need to find what values make the equation equal 0 on both sides.

so x is 7/2 or -1/2

How do I do 3y - 6 = 2x

Answers

Answer is if your looking for the slope and y-intercept
Slope: 2/3
Y-Intercept: (0,2)

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