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Mandarinka [93]
3 years ago
9

Pleaseee helpp meeee

Mathematics
2 answers:
Nastasia [14]3 years ago
8 0
Answer: 7

How to:
Plug in values
Use PEMDAS
Sergeu [11.5K]3 years ago
6 0

Answer:

7

Step-by-step explanation:

The new expression would be: 2(10) / 5 + 3. Using PEMDAS, first multiply 2(10) to get 20. Now you get: 20 / 5 + 3. Using PEMDAS, now divide 20 / 5 to get 4. The new expression is 4 + 3. Now, add to get 7 as your answer.

Hope it helps!

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7 1/7 - 1 9/10 estimate A 9 B 4 C 5 D 6​
Ann [662]

Answer:

C 5

Step-by-step explanation:

If 7 1/7 - 1 9/10 = 5 17/70

then the answer is about 5

6 0
3 years ago
Ariana has a large piece of fabric that she wants to use to make some scarves. The number N of scarves she can make is inversely
AveGali [126]

Answer:

9 scarves.

Step-by-step explanation:

We have been given that the number N of scarves Ariana can make is inversely proportional to the area A of each scarf.

We know that equation of two inversely proportional quantities in in form y=\frac{k}{x}, where, k is constant of variation and y is inversely proportional to x.

Let us find constant of variation using our given information.

N=\frac{k}{A}

15=\frac{k}{3}

15*3=\frac{k}{3}*3

45=k

Now, we will substitute A=5\text{ and }k=45 in our equation to solve for N.

N=\frac{45}{5}

N=9

Therefore, Ariana can make 9 scarves.

8 0
3 years ago
A computer software vendor claims that a new version of its operating system will crash fewer than 10 times per year on average.
Oksana_A [137]

Answer:

Step-by-step explanation:

The hypothesis is written as follows

For the null hypothesis,

µd ≤ 10

For the alternative hypothesis,

µ > 10

This is a right tailed test

Since no population standard deviation is given, the distribution is a student's t.

Since n = 97

Degrees of freedom, df = n - 1 = 97 - 1 = 96

t = (x - µ)/(s/√n)

Where

x = sample mean = 8.9

µ = population mean = 10

s = samples standard deviation = 3.6

t = (8.9 - 10)/(3.6/√97) = - 3

We would determine the p value using the t test calculator. It becomes

p = 0.00172

Since alpha, 0.01 > than the p value, 0.00172, then we would reject the null hypothesis. Therefore, At a 1% level of significance, there is enough evidence that the data do not support the vendor’s claim.

3 0
3 years ago
How do you prove the two triangles congruent?
bazaltina [42]
5 ideas
1.SSS (side, side, side) SSS stands for "side, side, side" and means that we have two triangles with all three sides equal. ...
2.SAS (side, angle, side) ...
3.ASA (angle, side, angle) ...
4.AAS (angle, angle, side) ...
5.HL (hypotenuse, leg)
3 0
3 years ago
A travel agency has 2,106 people registered for a trip. Each tour bus can seat 54 people.
mariarad [96]

Answer:

39 buses

Step-by-step explanation:

2,106 ÷ 54 = 39

8 0
3 years ago
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