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2 years ago

You are going to the grocery to buy the candies for you and your sisters/brothers. You want to buy

Mathematics

1 answer:

Llana [10]2 years ago

5 0

Answer: 35 chocolates were bought and 52 gums were bought.

Step-by-step explanation:

c + g = 87 where c is the number of chocolate and g is the number og gums

1.50c + 0.50g = 78.50 solve both equations by elimination.

-1.50c - 1.50g = -130.5

1.50 + 0.50g = 78.50

-1g = -52

g= 52

1.50c + 0.50(52) = 78.50

1.50c + 26 = 78.50

-26 -26

1.50c = 52.5

c = 35

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bazaltina [42]

Answer:

Step-by-step explanation:

First cuz the y-intercept is 3 so not B or D

And the slope is -2/3

so the answer is C.

i'm not really sure about the slope part.

3 0

3 years ago

Read 2 more answers

Which equation represents an exponential function that passes through the point (2, 36)?

Zepler [3.9K]

Answer: It would be the first equation because:

Step-by-step explanation:

In order to be an exponential function, the X

variable has to be in the exponent, that eliminates

the second and fourth answers

f(X) = 4(3)X

using the point (2,36)

f(2) = 4 (3)2

= 4 (9 )

= 36

6 0

2 years ago

Read 2 more answers

5. Suppose that a particular candidate for public office is in fact favored by p = 48% of all registered voters. A polling organ

mart [117]

Answer:

Probability that the sample proportion will be greater than 0.5 is 0.8133.

Step-by-step explanation:

We are given that the a particular candidate for public office is in fact favored by p = 48% of all registered voters. A polling organization is about to take a simple random sample of voters and will use the sample proportion to estimate p.

Suppose that the polling organization takes a simple random sample of 500 voters.

Let $\hat p$ = sample proportion

The z-score probability distribution for sample proportion is given by;

Z = $\frac{ \hat p-p}{\sqrt{\frac{\hat p(1-\hat p)}{n} } }$ ~ N(0,1)

where, $\hat p$ = sample proportion

p = population proportion = 48%

n = sample of voters = 500

The Z-score measures how many standard deviations the measure is away from the mean. After finding the Z-score, we look at the z-score table and find the p-value (area) associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X.

So, probability that the sample proportion will be greater than 0.5 is given by = P( $\hat p$ > 0.50)

P( $\hat p$ > 0.50) = P( $\frac{ \hat p-p}{\sqrt{\frac{\hat p(1-\hat p)}{n} } }$ < $\frac{0.50-0.48}{\sqrt{\frac{0.50(1-0.50)}{500} } }$ ) = P(Z < 0.89) = 0.8133

Now, in the z table the P(Z $\leq$ x) or P(Z < x) is given. So, the above probability is calculated by looking at the value of x = 0.89 in the z table which has an area of 0.8133.

Therefore, probability that the sample proportion will be greater than 0.50 is 0.8133.

6 0

3 years ago

A circle has its centre at (0,0) and passes through the point (-9,40).

BabaBlast [244]

Step-by-step explanation:

Radius of a cicke is calculated by 2 pi r

Equation is found by y=mx+C

3 0

1 year ago

Please help me please! Also, please show your work image shown below in attachment

WINSTONCH [101]

Answer:

see below

Step-by-step explanation:

some of your answers that you currently have are wrong, I'll note those mistakes below

- when factoring (ie 5x+15) only factor out things that can divide both numbers into a whole number ratio

5x+15 = 5(x+3), not (x+3)(x+5)

ie $\frac{10x^2+20x}{x+2}$

we see that 10x can divide the numerator in a whole number ratio

$10x^2+20x$ = 10x(x+2), not (x+2)(x+10)

second mistake: the first binomial expansion is incorrect.

you have the expansion formula right, but you added terms wrong, go look at it again

3. x^2+3x+2/ x^2+5x+6

(x+1)(x+2)/(x+3)(x+2)

(x+1)/(x+3)

4. (x^2+6x+8)/(x^2-16)

(x+4)(x+2)/(x+4)(x-4)

(x+2)/(x-4)

5. we can't simplify that any more, x and y are different variables so therefore we cannot cross out stuff on numerator and denominator

6. (x^4y^6)^2

(x^4y^6)(x^4y^6) = $x^8y^{12}$

remember that (x^a)(x^b) = x^(a+b)

or remember that (x^a)^b = x^ab

6 0

3 years ago