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3 years ago

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On Friday,Merida uses 1/4 of the box of pancake mix to make pancakes. On Saturday, she use 1 1/2 times as much pancake mix as Fr

iday.what fraction of the box of pancake mix does Merida use on Saturday

1 answer:

allsm [11]3 years ago

6 0

Answer: 1/2

Step-by-step explanation: because it saying how much and how many days she use

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X+y=11<br> x-y=-5<br> Please anyone help?

TiliK225 [7]

Answer:

3,8

Step-by-step explanation:

you can use the app photo math. just take a picture and you will get your answer

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3 years ago

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The average height of students at UH from an SRS of 12 students gave a standard deviation of 2.5 feet. Construct a 95% confidenc

Vanyuwa [196]

Answer:

c. [1.771;4.245] feet

Step-by-step explanation:

Hello!

The variable of interest is

X: height of a student at UH

X~N(μ;σ²)

You have to estimate the population standard deviation using a 95% confidence interval.

The statistic to use for the interval is a student Chi-Square with n-1 degrees of freedom. First you have to calculate the CI for the population variance:

$[\frac{(n-1)S^2}{X^2_{n-1;1-\alpha /2}} ;\frac{(n-1)S^2}{X^2_{n-1;\alpha /2}} ]$

$X^2_{n-1;1-\alpha /2}= X^2_{11;0.975}= 21.920$

$X^2_{n-1;\alpha /2}= X^2_{11;0.025}= 3.816$

n=12

S= 2.5

$[\frac{11*6.25}{21.920} ;\frac{11*6.25}{3.816}} ]$

[3.136; 18.016] feet²

Then you calculate the square root of both limits to get the CI for the population standard deviation:

[√3.136; √18.016]

[1.771;4.245] feet

I hope this helps!

4 0

4 years ago

What is the expression 4x^2 - 25 is equivalent to

kvasek [131]

Answer:

$\large\boxed{4x^2-25=(2x-5)(2x+5)}$

Step-by-step explanation:

$a^2-b^2=(a-b)(a+b)\\\\4x^2-25=2^2x^2-5^2\qquad\text{use}\ (ab)^n=a^nb^n\\\\=(2x)^2-5^2=(2x-5)(2x+5)$

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3 years ago

HELP FAST!! 30 POINTS

dezoksy [38]

Answer:

Im not so sure about what your asking, but I'm assuming that your asking about the lengths of the circle. The 6 inches would be the diameter and the 3 inches would be the radius and the 3.14 would be the circumference.

Step-by-step explanation:

I hope this helps, if it doesn't then just message me and ill be more than happy to help :)

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2 years ago

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Joey got a 25% raise on his salary. if his original salary was 1,200, how much was it after the raise was implemented?

Airida [17]

The new salary would be 1,500 since when we took .25 of 1,200, we got 300. We then added this to 1,200 to get 1,500.

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3 years ago