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3 years ago

Simplify 42-7-2-3-2-(1 point) 218 - 812 68

Mathematics

2 answers:

SVETLANKA909090 [29]3 years ago

8 0

Answer:

You can't really do anything with the information. I would help you but like I don't understand what you are trying to solve for.

slavikrds [6]3 years ago

6 0

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For (x - 1)(x - 7) to equal 0, either (x - 1) or (x - 7) must equal what?

Kisachek [45]

$(x - 1)(x - 7) = 0$

${x}^{2} - 8x + 7 = 0$

${x}^{2} - 8x = - 7$

$- 7x = \frac{ - 7}{x}$

$x = \frac{ - 7}{ \frac{x}{ - 7} } \implies x = x \implies x \in \mathbb{R}$

x is true for any number in real domain.

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3 years ago

Example of inverse operation

luda_lava [24]

Examples of inverse operations are addition and subtraction or multiplication and division.

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3 years ago

Can someone check if this is right please? If not what is the correct way?

Charra [1.4K]

A, B, and C are the coefficients. They are not the terms as you have written now.

A quadratic equation is in the form Ax^2 + Bx + C. Therefore, A = 1, B = 8, and C = -6.

The axis of symmetry is found using the equation -b/2a, as you've done. Therefore, the axis of symmetry is -8/2(1) = -4.

Hope this helps!! :)

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3 years ago

2) Lisa is ordering sand from the Internet, On one site she found sand on sale for

Anastasy [175]

For this case we must find the unit cost (dollars per pound) of each site and then compare.

We take into account that:

1kg equals 2.205 pounds

So, we have:

Site 1:

$C = 2.25 \frac {dollars} {pound}$

Site 2:

$5kg = 5 (2.205\ pounds) = 11.025 pounds$

So, the unit cost is:

$C = \frac {14} {11.025} \frac {dollars} {pound} = 1.27 \frac {dollars} {pound}$

Thus, the best deal is on site 2.

ANswer:

The best deal is on site 2.

7 0

3 years ago

Last week, Evelyn ran 44 laps at the community center. Peter ran 75% of the number of laps that Evelyn ran. How many laps did Pe

emmainna [20.7K]

Answer:

Peter ran 33 laps.

Step-by-step explanation:

Multiply Evelyn's 44 laps by 75% or 0.75 to get your answer.

44(0.75)=33

3 0

3 years ago