All categories

3 years ago

Subsitutey=4x-1 y=-3x-8

Mathematics

1 answer:

Usimov [2.4K]3 years ago

6 0

Answer:

x = -1

y = -5

Step-by-step explanation:

Because we have an equation for the value of y, we can do this:

4x - 1 = -3x - 8

Then we can solve for x.

4x = -3x - 7 --- add 1 to both sides

7x = -7 --- add 3x to both sides

x = -1 --- divide both sides by 7.

Now that we know the value of x, we can solve for y.

y = 4(-1) - 1 --- plug in x

y = -4 - 1 --- simplify

y = -5 --- simplify

Now we know x and y.

x = -1

y = -5

You might be interested in

A soccer ball is kicked in the air and follow the path h(x)=2x2+1x+6, where x is the time in seconds and h is the height of the

denis-greek [22]

Answer:

You can either factor or use quadratic formula to find where h(x)=0

Step-by-step explanation:

Remember that the ball is on the ground when h(x)=0 since that is the height. There will be two zeros, one is a negative number so would be before you kicked the ball, the other one will be when the ball comes back down.

4 0

3 years ago

List the next four multiples of 3/5

zlopas [31]

What is the rule? Then i will know how to it

6 0

3 years ago

Kito makes on online purchase of a guitar case for $39.99, a tuner for $24.99 and picks for $26.99. Taxes are 6% of the total pu

laila [671]

The answer is $97.49

3 0

3 years ago

Need to find the missing length and round to nearest tenth. I'm a bit confused.

astraxan [27]

ANSWER

15.9

EXPLANATION

Given:

A right-triangle with two sides and an angle

Desired Outcome:

The value of x

Apply the SOH CAH TOA rule

$\begin{gathered} tan\theta=\frac{x}{34} \\ x=34\times0.4663 \\ x=15.8544 \end{gathered}$

Hence, the value of x is 15.9 (rounded to the nearest tenth).

5 0

1 year ago

Find the equation of the line that is perpendicular to the line

ddd [48]

Answer:

$y=-x+16$

Step-by-step explanation:

Hi there!

What we need to know:

Linear equations are typically organized in slope-intercept form: $y=mx+b$ where m is the slope and b is the y-intercept (the value of y when x is 0)
Perpendicular lines always have slopes that are negative reciprocals (ex. 3 and -1/3, 5/6 and -6/5, etc.)

1) Determine the slope (m)

y=x-9

Rewrite the equation

y=1x-9

Now, we can identify clearly that the slope of the line is 1. The negative reciprocal of 1 is -1, so therefore, the slope of a perpendicular line would be -1. Plug this into $y=mx+b$ :

$y=-1x+b\\y=-x+b$