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3 years ago

Need to learn how to do beginner's algebra

Mathematics

2 answers:

maks197457 [2]3 years ago

8 0

I am doing this for points so i can catch up to my brother who is an expert

Aleonysh [2.5K]3 years ago

3 0

Just replace the number with letters. Alegbra is mainly about working with what you've already got, meaning it involves a lot of subtracting. Want me to go in more detail? Give me a thanks on this answer.

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Solve for y in terms of x: 3x = 15-5y Helppp

inysia [295]

5y=15-3x
y=3-3/5x
hope it helps:):)

4 0

3 years ago

Read 2 more answers

In triangle RST, RS = 6 cm, ST = 7 cm, and RT = 8 cm. What is the approximate measure of the largest angle in the triangle?

zubka84 [21]

the approximate measure of the largest angle in the triangle is 75.5 degrees

4 0

2 years ago

Read 2 more answers

I don’t understand how to do this

schepotkina [342]

Answer:

The solution is $x =0.$

Step-by-step explanation:

The equation

$\bold{(1).}\: sin(\dfrac{3\pi }{2} +x)+sin(\dfrac{3\pi }{2} +x) =-2$

can be rewritten as

$2* sin(\dfrac{3\pi }{2} +2) =-2$

and can be further simplified to

$sin(\dfrac{3\pi }{2}+x ) =-1$ .

Now, taking the inverse sine of both sides we get:

$sin^{-1}(sin(\dfrac{3\pi }{2} +x) =sin^{-1}(-1)$

$\bold{(2).}\: \dfrac{3\pi }{2} +2 =sin^{-1}(-1)$

The value of the right side on the interval $[0,2\pi)$ is

$sin^{-1}(-1) = \dfrac{3\pi}{2} \: \:( \text{or }270^o)$ ,

which makes the equation (2)

$\dfrac{3\pi }{2}+x =\dfrac{3\pi}{2}$

solving for $x$ gives

$\boxed{x = 0}$

which is our solution.

4 0

3 years ago

Graph function y=x+1

fiasKO [112]

Answer:

Are u asking to graph a point(s)?

Step-by-step explanation:

Ok I have the answer

3 0

3 years ago

Shirts are 5% off. The original price of one shirt is $15. What is the total cost, in dollars, of a shirt at the sale price, inc

Juliette [100K]

Answer:

$15.75

Step-by-step explanation:

$\frac{y}{15} :\frac{5}{100}$

y × 100 = 5 × 15

100y = 75

100y ÷ 100 = 75 ÷ 100

y = 0.75

$15 - $0.75

$14.25

$\frac{y}{15} :\frac{10}{100}$

y × 100 = 10 × 15

100y = 150

100y ÷ 100 = 150 ÷ 100

y = 1.5

$14.25 + $1.50

$15.75

8 0

2 years ago