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2 years ago

Please help me with the simplifying

Mathematics

1 answer:

aliya0001 [1]2 years ago

8 0

The key here is to not worry too much and just follow PEMDAS.

Here we have the expression $(5\cdot 7)^2$ . Following PEMDAS, we complete the expression inside the parentheses first, or $5\cdot 7 = 35$ . This gives us $(35)^2$ or just $35^2.$

Hope this helps.

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20 points<br> What is the explicit formula for this sequence? -5,-3,-1,1,3

oksian1 [2.3K]

It is B because the formula is 1st term (a) + (n-1) (T2-T1)

7 0

4 years ago

Read 2 more answers

Stephanie took a science exam that had two parts.

patriot [66]

Answer:

44 questions

Step-by-step explanation:

Part 1: She got 16 questions correct, which was 4/5 of the number of part 1 questions.

Let x = total number of questions in part 1

4/5x = 16

Divide both sides by 4/5

x = 16 ÷ 4/5

= 16 × 5/4

= 20

x = 20

There are 20 questions in part 1

She got 16 questions correct, which was 2/3 of the number of part 2 questions.

Let y = number of questions in part 2

2/3y = 16

Divide both sides by 2/3

y = 16 ÷ 2/3

= 16 × 3/2

= 24

y = 24

There are 24 questions in part 2

The total number of questions on Stephanie’s exam = part 1 + part 2

= 20 + 24

= 44 questions

8 0

3 years ago

The length of a rectangle is twice its width. The perimeter is 60 ft. Find its area.In the form of a paragraph, explain in compl

Vika [28.1K]

Set the following: Length = L Width = W

The length is twice the width: L = 2*W or: W = L/2

Perimeter: P = 60ft = 2*L + 2*W

Substituting L for W in the perimeter equation gives:

P = 60ft = 2*L + 2*(L/2) = 2*L + L = 3L

L = 60ft/3 = 20ft W=L/2=20ft/2=10ft

Verify result: Perimeter= P = 60ft = 2L + 2W = 2*20ft +2*10ft = 40ft+20ft = 60ft

The area of the rectangular is: Area = A = Length*Width = L*W = 20ft*10ft = 200 (ft)^2

-Mabel <3

7 0

3 years ago

110 freshmen participated in sports or clubs or both. 55 are involved in sports and 68 are involved in clubs. How many students

Varvara68 [4.7K]

Answer: 42

Step-by-step explanation:

Let A represents the number of freshmen participated in sports and B represents the number of freshmen participated in clubs.

Then , we have given that

$n(A)=55\\\\n(B)=68\\\\n(A\cup B)=110$

Using formula

$n(A\cup B)=n(A)+n(B)-n(A\cap B)$

We have,

$110=55+68-n(A\cap B)\\\\\Rightarrow\ n(A\cap B)=123-110=13$

Now, the number of students are involved in just sports is given by :-

$n(A)-n(A\cap B)=55-13=42$

Hence, 42 students are involved in just sports.

7 0

3 years ago

PLEASE HELP ME!!! PLEASE TRY TO DO ALL OF THEM THX! :)

kakasveta [241]

Hello there!

Number 1 is C (11, 4) Image is below

I don't know number 2, so so sorry!

Number 3 is A. 36 The formula for perimeter of a rectangle is (2 * base) + (2 * height)
The base = 13
The height = 5

(5 * 2) + (13 * 2)

10 + 26 = 36

Number 4 is 23 units.

I hope I was of assistance!

~ Fire

5 0

4 years ago