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3 years ago

Simplify the following expression 7x^2 - 15x + 5 - 2x - 8x^2

Mathematics

1 answer:

Delvig [45]3 years ago

7 0

Answer:

$\large\boxed{7x^2-15x+5-2x-8x^2=-x^2-17x+5}$

Step-by-step explanation:

$7x^2-15x+5-2x-8x^2\qquad\text{combine like terms}\\\\=(7x^2-8x^2)+(-15x-2x)+5\\\\=-x^2-17x+5$

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the area of a rectangular volleyball court is 1800 square feet the courts length is twice it width write a system of equations t

Marianna [84]

Answer:

The dimensions of the rectangular volleyball court are 60 ft x 30 ft

Step-by-step explanation:

Let

x ----> the length of rectangular volleyball court

y ---> the width of the rectangular volleyball court

we know that

The area of the rectangular volleyball court is equal to

$A=xy$

$A=1,800\ ft^2$

$1,800=xy$ ----> equation A

$x=2y$ -----> equation B

substitute equation B in equation A

$1,800=(2y)y$

$1,800=2y^2$

Solve for y

Simplify

$900=y^2$

take square root both sides

$y=30\ ft$

<em>Find the value of x</em>

$x=2y$

substitute the value of y

$x=2(30)=60\ ft$

therefore

The dimensions of the rectangular volleyball court are 60 ft x 30 ft

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4 years ago

Mrs. Arnold is serving hamburgers to her family at six tonight for dinner she uses 1/2 pound of ground meat for each hamburger p

Alexxandr [17]

Answer:

Yes

Step-by-step explanation:

1/2 pound= 8 ounces

50/8=6.25

six burgers with some meat leftover.

8 0

2 years ago

A hunter spots a bird on a branch of a tree 8m high. If the hunter is 6m away from the foot of the tree. Find the length between

forsale [732]

Answer:

The length is 2m

Step-by-step explanation:

Subtract the distance of the hunter and the bird and you have your answer, 2 meters

5 0

3 years ago

Rigoletto's Portraits specializes in making circular portraits of people. A large portrait is 78 in. in diameter. A medium portr

allsm [11]

Answer:

Step-by-step explanation:

4 0

3 years ago

Days on the market are shown for the 36 most recent home sales in the city of Sonando Hills. 16546208818045851658823266716813621

Volgvan

Solution

Given the question in the image, the following are the solution steps to answer the question.

STEP 1: Write the given data

$\begin{gathered} 165,46,20,88,180,45,85,165,8,8,23,26,67,168,136,21,143,8,84,22,106,131,16,152,171,64,33,116,151,117,99,61,159 \\ 73,51,136 \end{gathered}$

STEP 2: Find the mean

$\begin{gathered} mean=\frac{sum\text{ of data values}}{number\text{ of data values}} \\ sum\text{ of data values}=3144 \\ Number\text{ of data values}=36 \\ mean=\frac{3144}{36}=87.33333333\approx87.33 \end{gathered}$

mean is 87.33

STEP 3: Find the median

$undefined$

5 0

1 year ago