2 years ago

1. Which expression is equivalent to (y + 7) - (-8y + 14)?

Mathematics

1 answer:

zimovet [89]2 years ago

5 0

Answer:

Step-by-step explanation:

(y + 7) - (-8y + 14) = y + 7 + 8y - 14 = 9y - 7

You might be interested in

Farmer Smith enclosed his rectangular pasture with fence that cost him $1.50 per linear meter. If his pasture is twice as long a

maria [59]

Answer:

$2,700

Step-by-step explanation:

Let the width of the pasture be x, this means that the length of the pasture will be 2x

The area of a rectangle is L * B

Hence,

x * 2x = 18,000

2x^2 = 180,000

x^2 = 90000

x = 300 meters

This means the length is 600 metres

Now, to get the length of the fence, we need to know the actual perimeter which is 2(L + B)

= 2 ( 300 + 600)

2 * 900 = 1,800 metres

The cost is thus 1,800 * $1.50 = $2,700

6 0

2 years ago

Let x and y represent two real numbers. Write an algebraic expression to denote the quotient obtained when the product of the tw

sertanlavr [38]

(xy)/(x+y) hope this helps

5 0

3 years ago

If you flip a fair coin 10 times and it lands heads up 5 times, this would result in 50% probability of the coin landing heads u

Shtirlitz [24]

This is an example of empirical probability, although it gives the same ratio as a theoretical probability, because we based the result on our experiment

7 0

3 years ago

a square is cut from rectangle the side length of the square is half of the unknown with W the area of the Shaded region is 84 s

Brilliant_brown [7]

Answer:

Step-by-step explanation:

Just give me the answer

6 0

2 years ago

Quality control is an important issue at ACME Company which manufacturers light bulbs. In order to conduct testing of the life h

mrs_skeptik [129]

Answer: 3424.28

Step-by-step explanation:

Given data : 378, 361, 350, 375, 200, 391, 375, 368, 321

Number of data values = 9

Mean : $\overline{x}=\dfrac{\sum^n_{i=1} x_i}{n}$

$\\\\=\dfrac{378+361+350+375+200+391+375+368+321}{9}\\\\=\dfrac{3119}{9}\approx346.56$

Variance = $\dfrac{\sum^n_{i=1} (x_i-\overline{x})^2}{n-1}$

$\sum^n_{i=1} (x_i-\overline{x})^2 = (31.44)^2+(14.44)^2+(3.44)^2+(28.44)^2+(-146.56)^2+(44.44)^2+(28.44)^2+(21.44)^2+(-25.56)^2\\\\=27394.2224$

Variance = $\dfrac{27394.2224}{8}=3424.2775\approx3424.28$

4 0

2 years ago