Please help me I'm super super stuck on my Math homework

Mathematics

2 answers:

leonid [27]3 years ago

5 0

The answer is A or it should be

SSSSS [86.1K]3 years ago

3 0

A. 23 or -23
This is because how far x is away from 0 on a number line is it's absolute value which is represented by the bars.
b. 2.3
Same thing here. x is 2.3 because it's absolute value would have to be 2.3, which is what the answer says. (The negatives cancel each other out.)
c. 9
x is 9, so that 9+1 is 10, which is also ten in absolute value language here, and then that's the answer, too, so it all fits.
d. 3
Simplify the expression as k+4=7, and there ya go.

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3 years ago

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Solve by factorising<br><br><img src="https://tex.z-dn.net/?f=x%5E%7B2%7D" id="TexFormula1" title="x^{2}" alt="x^{2}" align="abs

Paladinen [302]

Step-by-step explanation:

$\underline{ \underline{ \text{Solving \: a \: quadratic \: equation \: by \: factorisation \: method}}} :$

In this method , the second order of polynomial ax² + bx + c is factorised and expressed as the product of two linear factors. Then each linear factor is separately solved to get the required solutions of the equation by applying zero factor property. In zero factor property , if p•q = 0 , then either p = 0 or q = 0 . In other words , if the product of two numbers is 0 , then one or both of the numbers must be 0.

$\underline{ \underline{ \text{Let's \: solve}}} :$