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svp [43]
3 years ago
8

Giselle is 24 years younger than her mother. In six years time she will be 1/4 of the age of her mother.

Mathematics
1 answer:
irina1246 [14]3 years ago
3 0

Let the age of Giselle = x

Age of mother = x+24

After 6 years,

Age of Giselle = x + 6

Age of mother = x+24+6

= x + 30

4(x + 6) = x + 30 \\ 4x + 24 = x + 30 \\ 4x = x  + 30 - 24 \\ 4x = x + 6 \\ 4x - x = 6 \\ 3x = 6 \\ x =  \frac{6}{3}  \\  \\ x = 2

<h2><u>Age of Giselle now = 2</u></h2>

... Hope this will help....

Please mark as brainliest

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ozzi

p-6p+7=3(2p-3)-4(-10+4p

We move all terms to the left:

p-6p+7-(3(2p-3)-4(-10+4p)=0

We add all the numbers together, and all the variables

p-6p-(3(2p-3)-4(4p-10)+7=0

We add all the numbers together, and all the variables

-5p-(3(2p-3)-4(4p-10)+7=0


8 0
4 years ago
Which would be the best method to use to solve the following equations? Explain your reasoning.
o-na [289]

A. square root property

3x^2-192=0\\x^2-66=0\\x^2=66\\x= -\sqrt{66} or \sqrt{66}

it has one value with x which is x^2 and it cn be easily solved without having to factorise, quadratic formula cant be used as it need ax^2+bx+c=0 format

B. factorising

x^2-x-6=0\\x^2+2x-3x-6=0\\(x+2)(x-3)=0\\x+2=0  and  x-3=0\\x= -2 \\x= 3

i just felt like this was easier to factorise than the other 2 options left

C. Completing the square

x^2-6x-7=0\\(x-3)^2=0\\x= -1\\x= 7

same reason personal preference

D- Quadratic

x^2-17x-7=0\\x=\frac{-(-17)+\sqrt{(-17)^2-4(1)(-7)} }{2(1)} \\x=\frac{-(-17)-\sqrt{(-17)^2-4(1)(-7)} }{2(1)}\\x=17.4\\x=-0.402

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7 0
3 years ago
Use the function below to find F(4).
Alexxx [7]

Answer:

A. 81

Step-by-step explanation:

F(x)=3^{x}

if x=4, then F(4) = 3^{4} = 3×3×3×3=81

7 0
2 years ago
?
Arada [10]

Using a confidence interval of proportions, it is found that the correct statement is given by:

D a confidence interval for estimating the cricket's true probability of landing on its feet is more narrow after the final 10 jumps than it was before the final 10 jumps.

<h3>What is a confidence interval of proportions?</h3>

A confidence interval of proportions is given by:

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

In which:

  • \pi is the sample proportion.
  • z is the critical value.
  • n is the sample size.

The margin of error is given by:

M = z\sqrt{\frac{\pi(1-\pi)}{n}}

The margin of error is inversely proportional to the square root of the sample size, hence, the higher the sample size, the narrower the interval is, hence option D is correct.

More can be learned about a confidence interval of proportions at brainly.com/question/25890103

7 0
2 years ago
What are the steps to do this and answer?
Zinaida [17]

Answer:

1526.04 mm^2

Step-by-step explanation:

The volume of a cylinder is given by

V = pi r^2 h where r is the radius and h is the height

V = 3.14 * (9)^2 *6

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4 0
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