MATHEMATICS MIDDLE SCHOOL

True or false:Every quadrilateral is a square.
Every square is a quadrilateral.
Every rhombus with four right angles is a square.

Answers

Answer 1
Answer: This is true because a shape with 4 sides are true
Answer 2
Answer: the answer to this is true

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4x^2 +28x -32 =0 solve this problem?

Answers

4x^2+28x-32=0 \ \ \ |:4 \n\n x^2+7x-8=0 \n\n x^2+8x-x-8=0 \n\n x(x+8)-(x+8)=0 \n\n (x+8)(x-1)=0 \n\n \nx+8=0 \n\n \boxed{x=-8} \n\n\n x-1=0 \n\n \boxed{x=1} \n\n\n \boxed{\boxed{S=\{-8;1 \}}}
we know that if xy=0 then x or/and y=0


4x^2+28x-32=0
factor out the 4
4(x^2+7-8)=0

factor out the x^2+7-8
we must find out what two numbers multiply to get -8 and add to get 7
the numbers are 8 and -1

so 4[(x-1)(x+8)]=0

we know that if exg 4y=0 then y=0
so
therefor
(x-1)(x+8)=0
set each to zero
x-1=0
x=1
x+8=0
x=-8

x could be 1 or -8

85% of what number is 17

Answers

do 17 divided by 85 and you should get an aproximate answer

Inequality question

Answers

Answer:

-15

Step-by-step explanation:

Can someone please explain to me how to find the area of this trapezoid?

Answers

The formula for finding a trapezoid's area is:

A = a+b
      ------ x h
         2
So for this, you just have to plug the numbers in.

A = 32 in²
Area=Base*Base/2(height)
To simplify it, get both of the bases, and multiply them. Then divide the product by 2. Then multiply that answer by the height

I really need help on #51

Answers

that's what I did and since the zeros would be -5 and 3 the answer would be 3 since it can't be a negative

36 is what percent of 120

Answers


x%*120=36

x/100 *120=36

120x/100=36

120x=3600      /:120

x=30

⇒36 is 30% of 120


What you do is make a proportion

1. x/100=36/120

2. 100 x 1.2 = 120

3. 36÷1.2=30

Answer= 30%
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Can someone help me please... Thanks!