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3 years ago

Can anyone help ?\me with this algebra answer

Mathematics

2 answers:

sleet_krkn [62]3 years ago

3 0

The first one is correct

USPshnik [31]3 years ago

3 0

Answer:

B) 2x-y=5

Step-by-step explanation:

Info we have:

The x-intercept is 2.5

The slope is 2/1=2

Therefore, our equation so far is y=2x+b

We plug in our x-intercept in and make y=0 to get b:

0=2(2.5)+b

0=5+b

-5=b

Therefore, the equation of the line is y=2x-5

Given our found equation, we can see which option works.

A is wrong because 2x+y=-5 -> y=-5-2x -> y=-2x-5

B is right because 2x-y=5 -> -y=5-2x -> y=-5+2x -> y=2x-5

C is wrong because x+2y=-5 -> 2y=-5-x -> y=-2.5-1/2x -> y=-1/2x-2.5

D is wrong because 2y-x=10 -> 2y=10+x -> y=5+1/2x -> y=1/2x+5

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For f(x) = 4x + 2 and g(x) = x^2 - 6, find (f+g)(x)

Margaret [11]

Answer:

$(f+g)(x) = x^2 + 4x - 4$

Step-by-step explanation:

We are given these following functions:

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(f+g)(x)

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2 years ago

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2 years ago

When solving the system of equations by graphing, what is the solution of 3x + 2y = 2 and 2x – y=6?

oksian1 [2.3K]

Answer:

answer B: (2,-2)

Step-by-step explanation:

First, write the equations on top of each other:

$3x+2y=2\\2x-y=6$

Then, multiply the the second equation by 2 so that we can use elimination of the y-variable:

$3x+2y=2\\2(2x-y)=2(6)\\\\3x+2y=2\\4x-2y=12$

Next, use elimination to find the value of "x":

$3x+2y=2\\+(4x-2y=12)\\\\7x+0=14\\7x=14\\\frac{7x}{7}=\frac{14}{7}\\x=2$

So, your x-value is 2.

Now, substitute your x-value into one of your equations, let's take the second equation, 2x-y=6:

$2x-y=6\\2(2)-y=6\\4-y=6\\4-4-y=6-4\\-y=2\\\frac{-y}{1}=\frac{2}{-1}\\y=-2$

Your y-value is -2.

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3 years ago

Find m < B. A)60 B)75 C)90 D)100

lozanna [386]

<B = <D = 60

answer
A. 60

7 0

3 years ago

A coconut shy at the village fair offers three throws for $1, or seven throws for $2. In one hour, 187 throws are made and the a

kotykmax [81]

Total throws = 187

Let three throws = 3t

And

Seven throws = 7s

3t + 7s = 187 -------------- (1)

While total collected money = $57

Money for three throws = 1t

Money for seven throws = 2s

Hence

1t +2s = 57 ------------------(2)

Now solving both equations, so multiply second equation by 3 and subtract it from equation (1);

Equation (2) becomes 3t + 6s = 171

While subtracting it from equation (1) gives the final equation as below.

s = 16

Putting s = 16 in equation (2);

1t + (2x16) = 57

1t + 32 = 57

t = 25

Thus 25 people bought three throws and 16 people bought seven throws.

As for 25 people having three throws = $25

And

16 people having seven throws = 2x16 = $32

So total earned money = 25 + 32 = $57

<span>Hence proved. </span>

6 0

3 years ago