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2 years ago

What is 21 x 21 + 100 x 100 / 50 - 20=?

2 answers:

8 0

To simplify this expression, use the order of operations to solve (Parentheses, Exponents, Multiplication and Division, Addition and Subtraction).

To start, since there are no exponents or parentheses, you do multiplication and division, starting from left to right since the two operations are on the same level. When you do this, you first multiply 21*21 which would get you to this:

441+100*100/50-20

Then, multiply 100*100 to get:

441+10000/50-20

Then, divide 10000/50:

441+200-20

Then, do 441+200 since addition and subtraction comes next:

641-20

And finally, subtract to get that your final answer is 621.

Kamila [148]2 years ago

6 0

621 is the answer to your question.

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You order two tacos and a salad. the salad costs 2.50.you pay 8% sales tax and leave a $3 tip. you pay a total of 13.80 how much

riadik2000 [5.3K]

Given:Price of one taco = x; price of 2 tacos = 2xPrice of salad = $2.50Sales tax = 8% of the combined price of two tacos and a salad, namely .08(2x + 2.50)Tip = constant fee = $3.00Total bill = $13.80 Therefore the equation becomes
2x + 2.50 + .08(2x + 2.50) + 3 = 13.80 Solutions: 2x + 2.50 + .16x + .20 + 3 = 13.80 (using the distributive property to multiply 2x and 2.5 by .08).2.16x + 2.70 + 3 = 13.80 (combining like terms)2.16x + 5.70 = 13.80 (combining like terms)2.16x + 5.70 = 13.80 - 5.70 (subtraction property of equality)2.16x = 8.10x = 8.10/2.16 = 3.75 (division property of equality)
The cost of a single taco is $3.75

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2 years ago

Can anyone plz help me

Andrew [12]

Let's solve number 7 step-by-step.
y/23=7
Step 1: Multiply both sides by 23.
y/23=7
(y23)*(23)=(7)*(23)
y=161 is our answer.

Let's solve number 8 step-by-step.
n−4.85=12.6
Step 1: Add 4.85 to both sides.
n−4.85+4.85=12.6+4.85
n=17.45 is our answer.


Let's solve number 12 step-by-step.
m/5=8
Step 1: Multiply both sides by 5.
m/5=8
(m/5)*(5)=(8)*(5)
m=40 is our answer.


Let's solve number 16 step-by-step.
a/12=8
Step 1: Multiply both sides by 12.
a/12=8
(a/12)*(12)=(8)*(12)
a=96 is or answer.

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3 years ago

there are 5 tables in the library.four students are sitting at each table. how many students are sitting in the library?

zubka84 [21]

Answer:

20 students are sitting in the library

Step-by-step explanation:

4 · 5 = 20

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2 years ago

What is the answer to this problem 75=3(-6n-5)

devlian [24]

Answer:

n=-5

Step-by-step explanation:

first you have to distribute the 3 to the -6 and the 5. In return u will get -18n and 15. then you have to cancel like terms. then you have to add 18 to the 75 which gives you 93. then you divide -18 by 93 which gives you -5.166 repeating... so all you have to do is round. your final answer will be -5.

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3 years ago

Formula of sec theta

katovenus [111]

Answer:

sec(theta)=1/cos(theta)

Step-by-step explanation:

sec(theta)=1/cos(theta)

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1 year ago