I need help ASAP please help giving brainlist

Mathematics

1 answer:

professor190 [17]3 years ago

5 0

Answer:

The Multiplicative Property Zero

Step-by-step explanation:

When you add a -8 with a positive 8 your answer is a zero

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Please help me if u can

Gre4nikov [31]

Answer:

What are you trying to figure out? Where the card goes?

Step-by-step explanation:

8 0

2 years ago

Select the statement that can be represented by -10 dollars.

Effectus [21]

Can we see the statement plz

3 0

2 years ago

The table below shows the sample space for spinning a 4-part spinner (labeled A, B, C, D) and then a 5-part spinner (labeled V,

Kipish [7]

2/9 i think im noy sure

8 0

3 years ago

Read 2 more answers

3x^2+6x-9=0 complete the square

PolarNik [594]

You could simplify this work by factoring "3" out of all four terms, as follows:

3(x^2 + 2x - 3) =3(0) = 0

Hold the 3 for later re-insertion. Focus on "completing the square" of x^2 + 2x - 3.

1. Take the coefficient (2) of x and halve it: 2 divided by 2 is 1
2. Square this result: 1^2 = 1
3. Add this result (1) to x^2 + 2x, holding the "-3" for later:
x^2 +2x
4 Subtract (1) from x^2 + 2x + 1: x^2 + 2x + 1 -3 -1 = 0,
or x^2 + 2x + 1 - 4 = 0
5. Simplify, remembering that x^2 + 2x + 1 is a perfect square:

(x+1)^2 - 4 = 0

We have "completed the square." We can stop here. or, we could solve for x: one way would be to factor the left side:

[(x+1)-2][(x+1)+2]=0 The solutions would then be:

x+1-2=0=> x-1=0, or x=1, and
x+1 +2 = 0 => x+3=0, or x=-3. (you were not asked to do this).

3 0

3 years ago

the length of a rectangle is five feet less than its width. If the area of the rectangle is 84 square feet, find its dimensions

KIM [24]

Let
x---------> the length of the rectangle
y--------> the width of the rectangle

we know that
A=84 ft²
[area of rectangle]=x*y-----> 84=x*y-----> equation 1
x=y-5------> equation 2
substitute 2 in 1
84=[y-5]*y-----> 84=y²-5y---------> y²-5y-84=0

using a graph tool-----> to resolve the second order equation
see the attached figure

the solution is
y=12
x=y-5-----> x=12-5-----> x=7

the answer is
the length of the rectangle is 7 ft
the width of the rectangle is 12 ft

6 0

3 years ago