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mariarad [96]
3 years ago
12

MmilinuSubtract - 3x2 + 4x + 10 from 2x2 – 2x​

Mathematics
1 answer:
ale4655 [162]3 years ago
5 0

Answer:

5x^2-6x-10

Step-by-step explanation:

(2x^2-2x)-(-3x^2+4x+10)

2x^2-2x+3x^2-4x-10

5x^2-2x-4x-10

5x^2-6x-10

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The volume of a 10 ounce box of cheerios is 258.75in3. the length of the box is 4 inches less than the height and the width is 3
Marina86 [1]

Answer:

Height of the box = 11.5 in

Step-by-step explanation:

Let h be the height of the box.

Assuming the volume of the Box is 258.75\ in^3.

Given:

Length = Height - 4 = h - 4

Width = 3 in

We need to find the height of the box.

Solution:

We know that the volume of the box.

Volume = Length\times height\times width

Substitute all given value in above formula.

258.75 = (h-4)\times h\times 3

Rewrite the equation as:

258.75 = 3h(h-4)

258.75 = 3h^2-12h

3h^2-12h-258.75=0

whole equation divided by 3.

h^2-4h-86.25=0

Use quadratic formula with a = 1, b = -4,c=-86.25

h=\frac{-b\pm \sqrt{(b)^{2}-4ac}}{2a}

Put these a, b and c value in above equation.

h=\frac{-(-4)\pm \sqrt{(-4)^{2}-4(1)(-86.25)}}{2(1)}

h=\frac{4\pm \sqrt{16+345}}{2}

h=\frac{4\pm \sqrt{361}}{2}

h=\frac{4\pm 19}{2}

For positive sign

h=\frac{23}{2}  

h = 11.5 in

For negative sign

h=\frac{-15}{2}

h = -7.5

We take positive value of h.

Therefore, the height of the box h = 11.5 in

4 0
2 years ago
Doug entered a canoe race
kenny6666 [7]

Answer:

he can row 2 miles in an hour

Step-by-step explanation:

When canoeing it takes about 20-30 minutes to row atleast 1 hour there are 2 sets of 30 minutes in an hour meaning he can row 2 miles

7 0
2 years ago
Please help me out on this :(( struggling !
Yuki888 [10]

Answer:

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Step-by-step explanation:

step by step explanation

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3 years ago
To find the quotient of 8 divided 1/3 by<br><br> • 1/8<br> • 1/3<br> •3<br> •8
olga nikolaevna [1]

Answer:

24 is the answer

Step-by-step explanation:

Ok so we need to find the quotient 8 divided by \frac{1}{3}

so we have to do 8 divide \frac{1}{3} = 8/1/3 =8x3=24

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6 0
2 years ago
What is the value of x to the nearest tenth?
Stolb23 [73]
X = 6 / tan(67)

x = 2.546

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