DESPERATE FOR HELP!!!<br> MATHS!!!<br> WILL AWARD BRAINLIEST!!!

I need help with this it’s saying the “blank” Method would be the best for solving this system of equations

aleksandrvk [35]

Answer:

-12+4y=x..............1

6(-12+4y)+4y=8

-72+24y+4y=8

28y=80

y=3.33

-12+4(3.33)=x

1.32=x

5 0

2 years ago

Jacob distributed a survey to his fellow students asking them how many hours they spent on the Internet in the past day. He also

Anna35 [415]

The linear equation B. y = -x +7.5 best describes the given model. The mood rating for a student that spent 5.5 hours online would be 2.

Step-by-step explanation:

Step 1; We plot the points that fall on the line and that lie on an exact x or y coordinate. The following 4 points are plotted (0.5, 7), (2, 5.5), (2.5, 5) and (3.5, 4). We substitute the values of x in the given equations to see which best describes the model.

Step 2; When y = x + 7.5, we get the coordinates as (0.5, 8), (2, 9.5), (2.5, 10) and (3.5, 11).

When y = -x + 7.5, the coordinates are (0.5, 7), (2, 5.5), (2.5, 5) and (3.5, 4).

When y = $\frac{-1x}{2}$ + 7.5, the coordinates are (0.5, 7.25), (2, 6.5), (2.5, 6.25) and (3.5, 5.75).

So equation 2 has the closest values to the actaul graph.

Step 3; By substituting x = 5.5, y = -(5.5) + 7.5 = 7.5 - 5.5 = 2.

8 0

3 years ago

Automobile tires can have a symmetric tread or an asymmetric tread. An experiment is to be conducted to determine whether the st

Genrish500 [490]

Answer:

Hello your question lacks the required options here are the options

By blocking on stopping distance

By blocking on tire tread type

By blocking on automobile type

By blocking on automobile size

Without blocking

Answer : By blocking on automobile size

Step-by-step explanation:

The experiment can best be conducted by blocking on the automobile and this is because the Automobile size and the stopping distance are proportionally related (associated ) as seen from the previous experiments hence the best experiment is By blocking on the size of the automobile is very crucial .

we can have a symmetric tread tire or an asymmetric tires fixed on the different types of Automobiles simultaneously and see if the stopping distance will be affected when we change the tires that way we are blocking on the Automobile size the same type of tires will be fixed at the same time on each automobile size

8 0

3 years ago

What is the value of x in the equation 1/3x − 2/3 =− 18?

Klio2033 [76]

Answer:

x = -52

Step-by-step explanation:

$\frac{1}{3}x-\frac{2}{3}=-18$

Let us solve for x.

$\frac{1}{3}x=-18+\frac{2}{3}$

$\frac{1}{3}x=-\frac{18*3}{1*3} +\frac{2}{3}$

$\frac{1}{3}x=-\frac{54}{3} +\frac{2}{3}$

$\frac{1}{3}x=\frac{-54+2}{3}$

$\frac{1}{3}x=\frac{-52}{3}$

Use cross multiplication to find the value of x.

$\frac{1x}{3}=\frac{-52}{3}$

$3*1x=3*-52$

$3x=-156$

Divide both sides by 3.

x = - 52

4 0

2 years ago

Pls help! evaluate the sine of the real number, pls give exact answers

solong [7]

Answer:

$-\frac{\sqrt2}{2} \\$ or exact is −0.70710678...

Step-by-step explanation:

Getting the point!

If we look at the unit circle and we find $-\frac{3\pi }{4}$ we see it is in the 3rd quadrant.
We know that all points in the 3rd quadrant have both negative x and negative y values.
We know that all radians with the base of 4 on the unit circle have the points of $(\frac{\sqrt{2}}{2} ,\frac{\sqrt{2}}{2})$
Because we are in the 3rd quadrant and both x and y are negative we know the point of $-\frac{3\pi }{4}$ is $(-\frac{\sqrt{2}}{2}, -\frac{\sqrt{2}}{2})$

Finding the sin!

Because we know that sin is asking us for the y value
We can just look at the point and find the y value!
the y value is $-\frac{\sqrt2}{2} \\$
Because this fraction does not need to be rationalized we are good!
Use a calculator to find the exact value and you get -0.70710678...
The final answer is $-\frac{\sqrt2}{2} \\$ or exact is −0.70710678...

Hope this helps!! Please mark Brainliest!

4 0

2 years ago

DESPERATE FOR HELP!!! MATHS!!! WILL AWARD BRAINLIEST!!!