All categories

2 years ago

21-3+18/6 What is the correct answer?

Mathematics

2 answers:

LuckyWell [14K]2 years ago

5 0

Answer:

21.

Step-by-step explanation:

Using Order of Operations, the division is done first.

21 - 3 + 18/6

= 21 - 3 + 3

= 18 + 3

= 21.

Mnenie [13.5K]2 years ago

3 0

Answer:

Step-by-step explanation:

PEMDAS:

Parenthesis

Exponent

Multiplication and Division

Addition and Subtraction

21-3+3

18+3

Hope this helps!

You might be interested in

A class has 6 boys and 15 girls.What is the ratio of boys and girls?

Sidana [21]

So if boys is 6 and girls is 15 it would be 6/15, but that can be simplified to 2/5.

8 0

3 years ago

Machine M, working alone at its constant rate, produces x widgets every 4 minutes. Machine N, working alone at its constant rate

Harman [31]

Answer:

Yes

Step-by-step explanation:

Given that Machine M, working alone at its constant rate, produces x widgets every 4 minutes. Machine N, working alone at its constant rate, produces y widgets every 5 minutes.

When both machines work for 20 minutes

Machine A would produce = $\frac{20}{4} =5$ widget and

Machine B would produce = $\frac{20}{5} =4$ widgets

So we can say that Machine A would produce more widgets than Machine N at that time.

Answer is Yes

8 0

2 years ago

Henry invested $59,000 in an account paying an interest rate of 2% compounded quarterly. Assuming no deposits or withdrawals are

AfilCa [17]

Answer:

Step-by-step explanation:

$A=P(1+r/4)^{(4t)}\\ \\ A=P(1+.02/4)^{(4t)}\\ \\ A=59000(1.005)^{4(20)}\\ \\ A=\$ 87929.98$

5 0

3 years ago

A culture started with 4,000 bacteria. After 2 hours it grew to 4400 bacteria. Predict how many bacteria will be present after 1

Art [367]

<span>idk why they want the dratted "k" . it is so simple w/o it !
in the form y = ab^x, a = 4000, b = 4400/4000 = 1.1, x = t/2
N = 4000*1.1^(13/2) = 7432 <------
-----------------
now you won't be satisfied with simplicity, so
4400 = 4000e^2k
e^2k = 1.1
k = ln 1.1/2 = .0477 to 4 dp
N(13) = 4000e^(13*.0477) = 7436 <------

note that apart from a roundabout way, you get a less accurate ans !</span>

5 0

2 years ago

Read 2 more answers

PLS ASAP I NEED HELP PLS HELP HELP ANSWER THE QEUSTION IN THE PHOTO

ddd [48]

Answer:

Step-by-step explanation:

if BU and BN weren't congruent, then the two triangles couldn't be proved to be congruent

8 0

2 years ago