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3 years ago

X^2-2y/y when x=20 and y=x/2

Mathematics

2 answers:

DerKrebs [107]3 years ago

4 0

Answer:

I believe its 398

Step-by-step explanation:

vagabundo [1.1K]3 years ago

3 0

Answer:

398

Step-by-step explanation:

x^2=400

substitute for y, 2y/y=(2*x/2)/(x/2)=x/(x/2)=x*(2/x)=2

400-2=398

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Anusha brings a $20 bill to the store. She purchases 4 pairs of socks for $2.25 each and a new belt for $7.50. How much change w

gulaghasi [49]

She will receive $18.50.

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4 years ago

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Please answer the following questions 1 2 and 3 with showing your work fully!

spayn [35]

Answer:

1. Point of intersection = (4, 360)

2. (4, 360) number of hours and the total cost of the repairs is the same for both repair shops

3. Amy's Auto Repair: $280

Step-by-step explanation:

1. y = 100 + 65x and y = 40 + 80x

Equate the equations and solve for x:

y = y ⇒ 100 + 65x = 40 + 80x

subtract 65x from both sides ⇒ 100 = 40 + 15x

subtract 40 from both sides ⇒ 60 = 15x

divide both sides by 15 ⇒ 4 = x

Therefore, x = 4

Substitute x = 4 into either of the equations to find y:

⇒ y = 40 + (80 x 4) = 40 + 320 = 360

Point of intersection = (4, 360)

2. The two lines intersect at (4, 360)

In this context, the point of intersection is where the number of hours and the total cost of the repairs is the same for both repair shops.

3. Substitute x = 3 into the equations and compare:

Mike's repair shop: y = 100 + (65 x 3) = 295

Amy's auto repair: y = 40 + (80 x 3) = 280

Therefore, Amy's Auto Repair is the cheapest (as 280 < 295) and the cost is $280.

5 0

3 years ago

Students in Mr. Rivas’ class were practicing their multiplication skills by rolling three 6-sided number cubes. Chris rolled a 2

guajiro [1.7K]

Sorry wrote down the wrong thing the first time. Try doing 2 plus 3 times 5.

3 0

3 years ago

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Pls answer and let me know if i can factor this r not

enyata [817]

Answer:

18r-4

Step-by-step explanation:

Here is your anwer

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3 years ago

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Donal currently has 7,200 points in his fantasy baseball league, which is 20% more point than Scott how many points does scott h

Sati [7]

<u>ANSWER: </u>

Scott has 6000 points in his fantasy baseball league.

<u>SOLUTION: </u>

Given, Donal currently has 7,200 points in his fantasy baseball league.

It is 20% more points than Scott points.

We need to know how many points does scott have?

Let the points with scott be x.

Then, according to give information

Donal points = scott points + 20% of scott points

$\begin{array}{l}{7200=x+20 \% \times x} \\\\ {7200=x+\frac{20}{100} \times x} \\\\ {7200=x+\frac{1}{5} \times x} \\\\ {7200=x+\frac{x}{5}}\end{array}$

By multiplying with 5 on both sides, we get

$\begin{array}{l}{7200 \times 5=5 \times x+x} \\\\ {36000=5 x+x} \\\\ {6 x=36000} \\\\{x=\frac{36000}{6}} \\\\ {x=6000}\end{array}$

Hence, scott has 6000 points in his fantasy baseball league.

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4 years ago