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3 years ago

HELP ME I NEED HELP I DO NOT UNDERSTAND THIS :')

Mathematics

2 answers:

jonny [76]3 years ago

8 0

Answer:

I believe that answer is correct, Y=+1

Step-by-step explanation:

AlekseyPX3 years ago

5 0

Answer:

-1 I think sorry if its wrong

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Select the correct first step for finding the y coordinate of the vertex of the equation y = -x^2 + 4x + 3, if the x coordinate

vovikov84 [41]

Answer:

Its the second choice.

Step-by-step explanation:

Substitute x = 2 into the function .

4 0

3 years ago

Last month 7,482 people visited the local fair. This month, 6,123 people visited the museum. How many more people visited the mu

faltersainse [42]

There isn’t enough information to find the answer because the first number is telling how many people visited to local fair last month.
If you were to compare the number of people that visited the local fair last month and the number of people that visited the museum this month then the answer would be 1359 but, it’s not asking for that. This is why you cannot solve this problem

7 0

3 years ago

On multiple-Choice history Test, rita received a mark of 80%. She answer 32 correctly

Fofino [41]

Let total number of questions be x.

According to the question,

80% of x is 32

or 80/100 × x = 32

or x = 32 ÷ 80/100

or x = 32 × 100/80

or x = 32 × 10/8

or x = 4 × 10

or x = 40

So, total number of questions is 40.

3 0

3 years ago

Your brother ordered some pens on the internet. It cost 2$ for each pen and the shipping fee is 3$. If your brother paid a total

Mars2501 [29]

Answer:

10pens

Step-by-step explanation:

23-3=20

20÷2=10

5 0

4 years ago

In order to conduct an experiment, 4 subjects are randomly selected from a group of 20 subjects. How many different groups of fo

irga5000 [103]

Answer:

The number of ways to form different groups of four subjects is 4845.

Step-by-step explanation:

In mathematics, the procedure to select k items from n distinct items, without replacement, is known as combinations.

The formula to compute the combinations of k items from n is given by the formula:

${n\choose k}=\frac{n!}{k!\times (n-k)!}$

In this case, 4 subjects are randomly selected from a group of 20 subjects.

Compute the number of ways to form different groups of four subjects as follows:

${n\choose k}=\frac{n!}{k!\times (n-k)!}$

${20\choose 4}=\frac{20!}{4!\times (20-4)!}$

$=\frac{20\times 19\times 18\times 17\times 16!}{4!\times 16!}\\\\=\frac{20\times 19\times 18\times 17}{4\times3\times 2\times 1}\\\\=4845$

Thus, the number of ways to form different groups of four subjects is 4845.

5 0

3 years ago