2 years ago

4)

Mathematics

1 answer:

erastovalidia [21]2 years ago

7 0

Answer:

D.) 4x + y

Step-by-step explanation:

3x + x + y

Add 3 x and x .

4 x + y

You might be interested in

I need help can someone help me plz

Mice21 [21]

Answer:

y = 250x + 1500

Step-by-step explanation:

Slope is 250

y-intercept = 3000 - 6 × slope

3000 - 1500 = 1500

Please Mark as Brainliest!

7 0

2 years ago

Solve for x.<br><br> x+27=−12

tiny-mole [99]

It is: x + 27 = -12
x = -12 - 27
x = -39

In short, Your Answer would be -39

Hope this helps!

8 0

2 years ago

Read 2 more answers

7. A number of minor automobile accidents occur at various high-risk intersections in Teton County despite traffic lights. The T

Anit [1.1K]

Answer:

Modification has not reduced the number of accidents.

Step-by-step explanation:

$H_0: \mu\geq0\\H_a:\mu$

A B C D E F G H

Before modification 5 7 6 4 8 9 8 10

After modification 3 7 7 0 4 6 8 2

Difference -2 0 1 -4 -4 -3 0 -8

Mean of differences $M_d = \frac{sum}{8}=\frac{2+0-1+4+4+3-0+8}{8}=2.5$

Standard deviation of differences = $\sqrt{\frac{\sum(x-\bar{x})^2}{n}}=2.9277$

Formula of paired t test :

$t=\frac{M_d}{\frac{s}{\sqrt{n}}}\\t=\frac{2.5}{\frac{2.9277}{\sqrt{8}}}\\t = 2.4152$

Df = n-1 = 8-1 =7

$t critical = t_{(df, \alpha)}=t_{7,0.01}=2.998$

t critical> t calculated

So, We failed to reject null hypothesis

Hence modification has not reduced the number of accidents.

6 0

2 years ago

Is 5x +4 equivalent to 5(x-1) +9

HACTEHA [7]

$5x+4=5(x-1)+9\\5x+4=5x-5+9\\4=4\\$

Yes, it does

8 0

3 years ago

...............????

Montano1993 [528]

Answer:

As Perimeter of rectangle =2(l+b)

Let original length & bredth of rectangle be L & B

⇒ 2(L−5+B−5)=26

⇒ 2(L+B−10)=26

⇒ 2(L+B)=46

⇒ L+B=23

7 0

2 years ago

Read 2 more answers