Numeracy involves skills that aren't always taught in the classroom – the ability to use numbers and solve problems in real life. It means having the confidence and skill to use numbers and mathematical approaches in all aspects of life. Numeracy is as important as literacy.

4 0

3 years ago

Need help with solving quadratics using the quadratic equation!

Charra [1.4K]

You need to solve the following equation:
-0.5x^2 +36x -161 = 451

Set right side to 0
-0.5x^2 +36x -612 = 0

Multiply by -2 to get rid of decimal and leading neg coefficient.
x^2 -72x + 1224 = 0

Use quadratic formula:
a = 1, b = -72, c = 1224

$x = \frac{-(-72) \pm \sqrt{(-72)^2 -4(1)(1224)}}{2(1)} \\ \\ x = \frac{72 \pm \sqrt{288}}{2} \\ \\ x = 27.51, 44.49$

Therefore the min price to have 451 profit is $27.51

3 0

3 years ago

Factor the following expression. 3 2 + 17 − 28<br><br> Explain your steps.

4vir4ik [10]

3(2)+17-28
multiply 3(2)=6
6+17-28
work left to right
6+17=23
23-28=-5

8 0

4 years ago

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