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Alex777 [14]
3 years ago
7

Kimberly is 3 times as old as her sister hallery. What is ratio of Kimberly age to hallery?

Mathematics
2 answers:
Sloan [31]3 years ago
7 0
I think the answer would be 3:1
Ipatiy [6.2K]3 years ago
5 0
Let. the age of hallery = x
Age of kimberly = 3x

Ratio of Kimberly age to hallery age = 3x/x = 3/1

In short, Your Answer would be 3:1

Hope this helps!
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Aleks04 [339]
B is correct answer.
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Write an equation for a parabola that has a vertex (1, 2) and passes through the point (3, -6).
Alex

Answer:

y= -2x²+4x.

Step-by-step explanation:

the common equation of the parabola is y=ax²+bx+c, where a, b, c - numbers.

1) the coordinates of the vertex are:

x_0=-\frac{b}{2a} \ and \ y_0=\frac{4ac-b^2}{4a}.

2) if according to the condition x₀=1, then b= -2a.

If according to the condition y₀=2, then   2=\frac{4ac-b^2}{4a}=\frac{4ac-4a^2}{4a}=c-a;

it means that c=a+2.

3) if b= -2a; c=a+2 and the point (3;-6) belongs to the given parabola, then it is possible to substitute them into the common equation of the parabola:

-6=3²*a-6a+a+2; ⇔ a= -2.

4) if a= -2, then b=-2a=4, and c=a+2=0.

5) if a=-2, b=4 and c=0, then the required equation of the parabola is:

y= -2x²+4x.

6 0
2 years ago
7oz is equal to how many lbs round it to the nearest tenth
Juli2301 [7.4K]
There are 16 ounces in one pound. So we do 7 divided by 16 to get our answer. 

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7 oz is approximately 0.4 lbs. 
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2 years ago
I need help please will mark you the brainliest
mafiozo [28]

the first and third choices are both correct.

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2 years ago
6-2x=3+5x <br> Solve for x
evablogger [386]

Answer:

x=3/7

Step-by-step explanation:

6-2x=3+5x

subtract 5x from both sides

6-2x-5x=3

subtract 6 from both sides

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add like terms

-7x=-3

divide both sides by -7

x=3/7

3 0
2 years ago
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