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3 years ago

I need help please this is due tomorrow

Mathematics

1 answer:

Mama L [17]3 years ago

7 0

If she always sells 110 then it can be less but we dont know if its equal or if she sold more

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3. Simplify. *<br> 5m3 + 2m– 7m3 – 8m

Oksanka [162]

Step-by-step explanation:

5m³ + 2m - 7m³ - 8m

= -2m³ -6m

= -2m(m² + 3)

4 0

3 years ago

Graph the function r(x) = -1/4 |x|

Free_Kalibri [48]

Here is your function graphed

8 0

3 years ago

When the sum of \, 528 \, and three times a positive number is subtracted from the square of the number, the result is \, 120. F

aleksandr82 [10.1K]

Let $x$ be the unknown number. So, three times that number means $3x$ , and the square of the number is $x^2$

We have to sum 528 and three times the number, so we have $528+3x$

Then, we have to subtract this number from $x^2$ , so we have

$x^2-(3x+528)$

The result is 120, so the equation is

$x^2 - 3x - 528 = 120 \iff x^2 - 3x - 648 = 0$

This is a quadratic equation, i.e. an equation like $ax^2+bx+c=0$ . These equation can be solved - assuming they have a solution - with the following formula

$x_{1,2} = \dfrac{-b\pm\sqrt{b^2-4ac}}{2a}$

If you plug the values from your equation, you have

$x_{1,2} = \dfrac{3\pm\sqrt{9-4\cdot(-648)}}{2} = \dfrac{3\pm\sqrt{9+2592}}{2} = \dfrac{3\pm\sqrt{2601}}{2} = \dfrac{3\pm51}{2}$

So, the two solutions would be

$x = \dfrac{3+51}{2} = \dfrac{54}{2} = 27$

$x = \dfrac{3-51}{2} = \dfrac{-48}{2} = -24$

But we know that x is positive, so we only accept the solution $x = 27$

6 0

3 years ago

What does the quantity 28-8 represent?

nikklg [1K]

You question implies simple subtraction is needed:

28-8=20

5 0

2 years ago

At an ice cream shop, you can get a waffle cone, sugar cone, cake cone or a cup in sizes small, medium and large. There are 20 i

xeze [42]

It equals 3600 combinations
4(equals the types of cones/cup) x 3(the measures of each one) x 20 (ice cream flavors) x 15 (toppings) += 3600 combinations

4 0

3 years ago