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
Valentin [98]
3 years ago
11

21x40=840, so 21x 42 = Use mental math

Mathematics
1 answer:
Bad White [126]3 years ago
8 0

Answer:

882

Step-by-step explanation:

mental math right ;)

You might be interested in
Could someone please help
alexdok [17]

Answer:

Answer:<em>I think that is right...</em>

Answer:<em>I think that is right...Please make me brainliest...</em>

3 0
2 years ago
Using the figure below, find the area of the circle.
jeyben [28]
Refers to the attachment
6 0
2 years ago
Which function does this graph represent?
IRISSAK [1]

Answer:

B

Step-by-step explanation:

f(x)= -3(x+1)^2 +2

>  -3,   Has to negative because its facing down

>(x+1) means it goes to the left 1 unit

> +2 at the end means it goes up by 2 units

8 0
3 years ago
Read 2 more answers
Cam was bom weighing 8.6 pounds. Every day, he gained the same amount of weight. After 30 days, he weighed 14.9
guajiro [1.7K]

Answer:

So I'm not entirely sure about this one, but I believe he gained 0.21 pounds each day for 30 days

Step-by-step explanation:

Since Cam was born weighing 8.6 pounds and after 30 days weighed 14.9, subtract 14.9-8.6 to find how much he gained.

14.9 - 8.6 = 6.3

Now that we know how much he gained, we have to find out how much he gained per day for 30 days. To do this, divide 6.3 by 30

6.3 / 30 = 0.21

To make sure this answer is correct, multiply 0.21 by 30 and add that to 8.6. It should equal 14.9.

I hope this helps!

7 0
3 years ago
Read 2 more answers
a boat going upstream at 4 mph then travels downstream at 10 mph. what is the rate of the boat in still water​
elixir [45]

Answer:

7 mph

Step-by-step explanation:

If b is the rate of the boat, and s is the rate of the stream, then:

b − s = 4

b + s = 10

Solve the system of equations with substitution or elimination.  Using elimination, add the equations together:

2b = 14

b = 7

The boat's rate is 7 mph.

7 0
3 years ago
Other questions:
  • What is the value of x? enter your answer in the box. units triangle a p r with line segment c d parallel to segment a p with c
    8·2 answers
  • A spinner with 11 equal-sized sections numbered 1 to 11 is spun once. What is the probability that the spinner will land on a nu
    12·1 answer
  • Can someone help me with this geometry question asap, thanks!
    8·1 answer
  • Y= 3x+7<br> y = -2x - 3<br> Whats the x and y for the solution
    7·1 answer
  • mrs Hills es 4 años mayor que el doble de la edad de su hijo. si la suma de sus edades es 50, ¿cuántos años tiene su hijo?
    13·2 answers
  • Pamela's age is two times Jiri's age. The sum of their ages is 84. What is Jiri's age?
    15·1 answer
  • Solve x-5/7-2x=5-x/3+1<br>CAN ANYONE ANSWER​
    10·1 answer
  • What is the new equation of the quadratic function​
    14·1 answer
  • 1350 + 100 - 399 ......
    5·2 answers
  • Need help please thank you
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!