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Anarel [89]
2 years ago
13

Is (-1,2) a solution to the following system of equations? Show and explain why or why not.

Mathematics
1 answer:
fenix001 [56]2 years ago
4 0

Answer:

It is a solution.

Step-by-step explanation:

Plug in (-1,2) to both equations:

Plug in -1 to see if 2 comes out:

f(x)=x^2+3x+4

y=(-1)^2+3(-1)+4

y=1-3+4

y=-2+4

y=2

(yes it works)

g(x)=2x+4

y=2(-1)+4

y=-2+4

y=2

(yes it works)

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128 is 74% of what number
ale4655 [162]
Hey mate!

You stuck?

128 is 74% of 172.972973 or 173 rounded

173x .74= 128.02 or 128 rounded


Hope this helps!
5 0
3 years ago
Read 2 more answers
If 1 inch equals approximately 2.5 centimeters, how many centimeters are equal to 12.5 inches?
andriy [413]

Answer:

31.75 cm is equal to 12.5 in

Step-by-step explanation:

3 0
3 years ago
7. how many tiles measuring
Margaret [11]

Answer:

245 tiles

Step-by-step explanation:

1 meter = 100 cm

Area of bathroom = 3.5m x 2.8m = 350x280 = 9800 cm²

Area of each tile = 20cm x 20cm = 400 cm²

Total number of tiles required = 9800/400 = 245

<u>Note</u>

Strictly speaking we have to find out how many tiles can be fitted in the length and breadth of the bathroom. Since the bathroom is 350 cm wide, we can fit 350/20cm = 17.5 tiles. However, there is no concept of 1/2 tile so the question has an ambiguity. along the width, we can fit 280/10 = 14 tiles

17.5 x 14 = 245 but if the question is reworded to how many tiles do we need to purchase to floor the bathroom it would be 18 x 14 = 252

5 0
2 years ago
Lol help now files just type it
insens350 [35]

Answer:

2 = 4/2

Step-by-step explanation:

Well the one for the 2 wholes, Since 2 wholes equal 4/2

because 4/2 simplified is 2 whole it I believe would be 4/2

6 0
3 years ago
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Which equation is the inverse of y=2x^2-8
shusha [124]

Step-by-step explanation:

In order to get the inverse of equation, we will interchange the variables and solve for x and y as follows.

             y = 2x^{2} - 8

whereas,  y + 8 = 2x^{2}

    or              x = \sqrt{\frac{y+8}{2}}

Now, on interchanging the variable we will get the equation as follows.

               x = 2y^{2} - 8

               x + 8 = 2y^{2}

                     y = \sqrt{\frac{x+8}{2}}


4 0
3 years ago
Read 2 more answers
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