1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Marrrta [24]
3 years ago
7

How do you estimate21× 78

Mathematics
1 answer:
finlep [7]3 years ago
8 0

21 *78=

20 * 80=

1600 as an estimate


You might be interested in
Hey lol um pls help i don’t get it
frutty [35]
I can’t see it it’s blurry be
8 0
3 years ago
Solve for H: A = L ⋅ W ⋅ H
Sergeu [11.5K]

Answer:

The answer would be

H = A over L times W

Step-by-step explanation:

This is because, when you multiply the L, W, and H you end up getting A. This means that A is the biggest number. We automatically can tell that H is what were looking for so putting those two things together we have this: H = A over ???

The ??? would have to be L times W because those are the only things left and they get multiplied together which in the end leaves us with

H = A over L times w

aka

H=A/LxW

6 0
3 years ago
A president, treasurer, and secretary, all di erent, are to be chosen from a club consisting of 12 people (whose names are I, J,
Ierofanga [76]

Answer:

There are 220 choices

Step-by-step explanation:

Given

People = 12

Selection =3 (President, Treasurer and Secretary)

Required

Determine number of selection (if no restriction)

This is calculated using the following combination formula:

^nC_r = \frac{n!}{(n - r)!r!}

Where

n = 12

r= 3

So, we have:

^nC_r = \frac{n!}{(n - r)!r!}

^{12}C_3 = \frac{12!}{(12 - 3)!3!}

^{12}C_3 = \frac{12!}{9!3!}

^{12}C_3 = \frac{12*11*10*9!}{9!3!}

^{12}C_3 = \frac{12*11*10}{3!}

^{12}C_3 = \frac{12*11*10}{3*2*1}

^{12}C_3 = \frac{12*11*10}{6}

^{12}C_3 = 2*11*10

^{12}C_3 = 220\ ways

<em>There are 220 choices</em>

8 0
3 years ago
I need help :( with this it's kinda confusing
elena-14-01-66 [18.8K]
5:65h
6:110x
7:12x
I hope this helps
8 0
3 years ago
35 points!!! Help!! Make sure u answer all!!!
Mademuasel [1]

Answer:

Expression for Perimeter:  6x + 6

x = 12 cm

Verify A = 360:

2(12) x (12+3) = 360

24 x 15 = 360

360 = 360

Step-by-step explanation:

8 0
3 years ago
Other questions:
  • What is the positive solution to the equation 2x^2+25=73
    8·1 answer
  • Triangle ABC is a right triangle.
    6·2 answers
  • Find m∠C m . <br><br> A. 34<br><br> B. 57<br><br> C. 52<br><br> D. 64
    11·1 answer
  • 33. A competition question requests students to form a three-digit number.
    10·1 answer
  • Joel looks at a map of Colorado, scowls, and tears it to shreds. "I don't need this lousy map," he mutters, puffing out his ches
    12·2 answers
  • Hello , I need help please and thank you very important
    5·2 answers
  • Pls help me on this i don't know what to do ​
    12·1 answer
  • WILL MARK BRAINLIEST
    7·2 answers
  • Estimate 4/5x6/7<br> I WIL MARK BRAINLIEST IF ITS THE BEST ANSWER
    14·1 answer
  • -11, -7 , -3 what is the next integer in the pattern​
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!