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2 years ago

Mackenzi is buying school supplies. She needs to buy 30 writing utensils so that she doesn't run out during the year

Mathematics

1 answer:

Salsk061 [2.6K]2 years ago

3 0

She can buy 16 pens and 16 pencils.

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Solve 3x-4=√(2x^2-2x+2)

DiKsa [7]

Answer:

Step-by-step explanation:

Begin the solution by squaring both sides of the given equation. We get:

(3x - 4)^2 = 2x^2 - 2x + 2, or:

9x^2 - 24x + 16 = 2x ^2 - 2x + 2

Combining like terms results in:

7x^2 - 22x + 14 = 0

and the coefficients are a = 7, b = -22, c = 14, so that the discriminant of the quadratic formula, b^2 - 4ac becomes (-22)^2 - 4(7)(14) = 92

According to the quadratic formula, the solutions are

-b ± √discriminant -(-22) ± √92 22 ± √92

x = ------------------------------- = ----------------------- = ------------------------

2a 14 14

8 0

3 years ago

What is 1/10 of 12.5 miles?

vazorg [7]

Answer:

1.25

Step-by-step explanation:

(1/10) x 12.5

4 0

3 years ago

The sum of three numbers $x$ ,$y$, $z$ is 165. When the smallest number $x$ is multiplied by 7, the result is $n$. The value $n$

babymother [125]

You're given

x + y + z = 165

7x = n

n = y - 9

n = 9 + z

and you want to find xyz.

Solve the last three equations for x, y, and z :

7x = n → x = n/7

n = y - 9 → y = n + 9

n = 9 + z → z = n - 9

Substitute x, y, and z into the first equation and solve for n :

n/7 + (n + 9) + (n - 9) = 165

n/7 + 2n = 165

n + 14n = 1155

15n = 1155

n = 77

Now solve for x, y, and z :

x = 77/7 = 11

y = 77 + 9 = 86

z = 77 - 9 = 68

Then the product is

xyz = 11 • 86 • 68 = 64,328

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2 years ago

If the perimeter of a rectangle is 36 feet and the length is twice as long as the width, what is the measurement of the length?

DanielleElmas [232]

The length is 12 feet(c.).

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3 years ago

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10,000 more than 395,040is?

Marizza181 [45]

405,040 hope that helps.

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3 years ago

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