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3 years ago

Abby has 20 pieces of halloween candy.she gives 10% away how many does she have left

Mathematics

2 answers:

Brrunno [24]3 years ago

4 0

18 Pieces of candy left

Verdich [7]3 years ago

4 0

10% of 20? the answer is 2.

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Can you solve this?? It's, 5x-9y= -2

Andrej [43]

The slope is m= 5/9 sorry if you weren’t looking for the slope

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3 years ago

Thirty-three college freshmen were randomly selected for an on-campus survey at their university. The participants' mean GPA was

Ivan

Answer: $\pm0.1706$

Step-by-step explanation:

Given : Sample size : n= 33

Critical value for significance level of $\alpha:0.05$ : $z_{\alpha/2}= 1.96$

Sample mean : $\overline{x}=2.5$

Standard deviation : $\sigma= 0.5$

We assume that this is a normal distribution.

Margin of error : $E=\pm z_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}$

i.e. $E=\pm (1.96)\dfrac{0.5}{\sqrt{33}}=\pm0.170596102837\approx\pm0.1706$

Hence, the margin of error is $\pm0.1706$

7 0

3 years ago

Please look at the picture and answer it thank you.

ElenaW [278]

Answer:

x = 17

Step-by-step explanation:

The sum of all angle measures in any triangle is 180 degrees.

Thus, 23 + 5x - 18 + 90 = 180.

Step 1: Simplify both sides of the equation.

$(5x)+(23+90-18)=180$
$5x+95=180$

Step 2: Subtract 95 from both sides.

$5x+95-95=180-95$
$5x=85$

Step 3: Divide both sides by 5.

$5x/5=85/5$
$x=17$

Step 4: Check if solution is correct.

$(5*17-18)+23+90=180$
$67+23+90=180$
$180=180$

Thus, x = 17.

6 0

2 years ago

What is the area of this triangle 12in 3in

grin007 [14]

Answer:

Step-by-step explanation:

To find the area of a triangle, multiply the base by the height, and then divide by 2. The division by 2 comes from the fact that a parallelogram can be divided into 2 triangles. For example, in the diagram to the left, the area of each triangle is equal to one-half the area of the parallelogram.

7 0

3 years ago

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Use your understanding of the constant of proportionality to determine k. If the relationship does not have a constant of propor

mihalych1998 [28]

Answer:

Far left: constant of proportionality= 3.4

Middle: q=12----COP=3

Far right: COP=4----not proportional

3 0

3 years ago

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