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3 years ago

Algebra=pain, Plz help lol

Mathematics

2 answers:

Elenna [48]3 years ago

6 0

Answer:

I think it's C. 2x^2-15

Step-by-step explanation:

I'm really sorry if I'm wrong my brain is dieing from writing essays in ela.

was I close

Brut [27]3 years ago

4 0

I think it is B

(2x+1)-(x^2-7)
You have to change the + and - on the second set then simplify

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A landscaper, who just completed a rectangular flower garden measuring 15 feet in length by 7 feet in width, orders 1 cubic ya

grin007 [14]

The width of the border will be 0.1648... ft or 1.9786... inches.

Explanation

Lets assume, the width of the border is $x$ ft.

The rectangular garden is 15 ft in length and 7 ft in width. So, the area of the garden $=(15*7)ft^2= 105 ft^2$

Now, the length of the garden including border $=(15+2x) ft$ and the width of the garden including border $=(7+2x) ft$

So, the area of the garden including the border $= (15+2x)(7+2x) ft^2$

Thus the area of the border $=[(15+2x)(7+2x)-105] ft^2$

Total amount of premixed cement needed is 1 yard³ = 27 ft³

As the depth of the border is 44 inches or $(\frac{44}{12})ft$ or $(\frac{11}{3})ft$ , so....

$\frac{11}{3}[(15+2x)(7+2x)-105] = 27\\ \\ 11(105+44x+4x^2 -105)=81\\ \\ 11(4x^2+44x)=81\\ \\ 44x^2+484x-81=0$

Using quadratic formula....

$x= \frac{-484+/-\sqrt{484^2-4(44)(-81)}}{2(44)}\\ \\ x= \frac{-484+/-\sqrt{234256+14256}}{88}\\ \\ x= \frac{-484+/-\sqrt{248512} }{88}\\ \\ x= 0.1648...$

(Negative value ignored)

So, the width of the border $=0.1648...ft= (0.1648...*12)inches= 1.9786...inches$

5 0

3 years ago

Mr. Cornapple is the fruit & vegetable buyer for a large school district. In a given week, he has a budget of $6,550. Bushel

Nina [5.8K]

Answer:

40x + 30y ≤ 6,550

Step-by-step explanation:

Given:

Cost of each apple bushels = $40

Cost of each corn bushels = $30

Total budget = $6,550

Find:

Inequality

Computation:

Assume;

Total number of apple bushels = x

Total number of corn bushels = y

So,

40x + 30y ≤ 6,550

6 0

3 years ago

Yesterday, the price of a loaf of bread at five supermarkets was $1.49,$1.64,$1.74,$1.52, and $1.66, but today each supermarket

Crank

$1.66 will be the mean of the bread at the supermarkets

3 0

4 years ago

12+n=49 true or false

Alex777 [14]

It depends because n is just a variable so it can be any number.

3 0

3 years ago

Read 2 more answers

A group of friends were working on a student film that had a budget of $700. They

Ipatiy [6.2K]

Answer:

231

Step-by-step explanation:

subtract 700 by 469

4 0

3 years ago