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Oduvanchick [21]
2 years ago
6

I need help I’ll give branliest

Mathematics
2 answers:
valkas [14]2 years ago
5 0

Answer:

B

Step-by-step explanation:

we know the thickness is x, so the sides are 3+2x and 4+2x

then we use foil:

(3+2x)(4+2x)=12+6x+8x+4x^2=4x^2+14x+12

we know the area is 15

4x^2+14x+12=15

4x^2+14x-3=0

So it is B

katovenus [111]2 years ago
3 0

Answer:

A

Step-by-step explanation:

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A square has sides that are 80 ft long. Which equations can be used to calculate d the length of a diagonal of the square in fee
LenKa [72]
Notice the picture below

just use the pythagorean theorem to ge the diagonal

\bf c^2=a^2+b^2\implies c=\sqrt{a^2+b^2}

7 0
3 years ago
Zoey makes $75 for 3 hours of work. How much money did Zoey make each hour?
stiks02 [169]
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2 years ago
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X+3y=14<br> y=3x-14<br> Solving systems using substitution <br> How do i do this?
Free_Kalibri [48]
X + 3y = 14
x + 3(3x - 14) = 14
x + 9x - 42 = 14
10x - 42 = 14
<u>      + 42 + 42</u>
       <u>10x</u> = <u>56</u>
        10     10
           x = 5.6
5.6 + 3y = 14
<u>- 5.6         - 5.6</u>
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          3       3
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6 0
4 years ago
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I don't have any idea. ​
kaheart [24]

Answer:

Domain = ( -∞,∞), {x|x ∈  R}

Range (-∞,2], {y|y ≤ 2}

Vertex (h,k) = (6,2)

Step-by-step explanation:

(Domain / Range) The absolute value expression has a V shape. The range of a negative absolute value expression starts at its vertex and extends to negative infinity.

(Vertex) To find the x coordinate of the vertex, set the inside of the absolute value

x − 6 equal to 0 . In this case, x − 6 = 0 .

x−6=0

Add 6 to both sides of the equation.

x=6

Replace the variable x with 6 in the expression.

y=−1/3⋅|(6)−6|+2

Simplify−1/3⋅|(6)−6|+2.

y=2

The absolute value vertex is ( 6 , 2 ) .

(6,2)

Hope this helps

6 0
3 years ago
Solve the following system of equations by elimination​
olya-2409 [2.1K]

Answer:

y = -6

x = 1

Step-by-step explanation:

-x + 2y = -13

-x - 2y = 11

Sum the equations:

-x -x = -2x

+2y - 2y = 0

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then

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from the first eq.

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check:

from the second eq.

-x -2y = 11

-1 -(2*-6) = 11

-1 -(-12) = 11

-1 + 12 = 11

5 0
2 years ago
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