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bagirrra123 [75]
2 years ago
6

What value of b will make the expressions −13.2x+b and −2.2(6x−2.4)+4.3 equivalent?

Mathematics
1 answer:
tigry1 [53]2 years ago
5 0

<u>We know that:</u>

  • −13.2x + b = −2.2(6x − 2.4) + 4.3

<u>Solution:</u>

  • −13.2x + b = −2.2(6x − 2.4) + 4.3
  • => −13.2x + b = -13.2x + 5.28 + 4.3
  • => −13.2x + b = -13.2x + 9.58
  • => b = 9.58

Hence, the value of b to make this equation equivalent is 9.58

<u></u>

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Step-by-step explanation:

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Are these right triangles ?<br> Answer please ASAP
V125BC [204]

Answer: Yes.

Step-by-step explanation: Right triangles are 90° and with a square. This is a right triangle. Just remove the line that makes it a triangle, you'll see.

4 0
3 years ago
Kristin spent $131 on shirts. Fancy shirts cost $28 and plain shirts cost $15. If she bought a total of 7 then how many of each
Tpy6a [65]
Hi there!!

First, Let plain shirts be x
Let fancy shirts be y 
x + y = 7
15x + 28y = 131 
Multiply first equation by 28 to eliminate y: 
28x + 28y = 196
<span>15x + 28y = 131 
</span>Subtracting the two equations:
13x = 65
<span>x = 5 </span>
Substituting x to get y:
x + y = 7
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<span>y = 2 </span>
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3 0
3 years ago
The area of parallelogram WXYZ is approximately 45 square units.
neonofarm [45]

Answer:

Option (4)

Step-by-step explanation:

Area of a triangle = \frac{1}{2} (a.b.\text{Sin}\theta)

Where a and b are the sides of a triangle and θ is the angle between the sides a and b.

By this rule,

Area of ΔWZY = \frac{1}{2}(\text{WZ}).(\text{YZ}).\text{Sin}(115)

45 = \frac{1}{2}(\text{YZ}).(10).\text{Sin}(115)

9 = (YZ).Sin(115)°

YZ = \frac{9}{\text{Sin}(115)}

YZ = 9.93

Perimeter of parallelogram WXYZ = WX + XY + YZ + WZ

                                                         = 9.93 + 10 + 9.93 + 10

                                                         = 39.86

                                                         ≈ 40 units

Therefore, perimeter of the parallelogram is 40 units.

Option (4) is the answer.

4 0
3 years ago
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