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
Pani-rosa [81]
3 years ago
11

There are twice as many Robins has blue jays and their 21 altogether how many blue jays are there

Mathematics
1 answer:
Lunna [17]3 years ago
5 0
R + b = 21
2b = r

now we sub eq 2 into eq 1
r + b = 21
2b + b = 21
3b = 21
b = 21/3
b = 7

2b = r
2(7) = r
14 = r

so there are 7 bluejays (b) and 14 robins (r)...for a total of 21
You might be interested in
Write an equation in point-slope form of the line that passes through the point (3,-5) and has a slope of 2.
Gre4nikov [31]

Answer:

Y=2x-11

Step-by-step explanation:

8 0
3 years ago
the width of a laptop is 11.25 inches. the width is 0.75 times the length. what is the length of the laptop
Snezhnost [94]

\bf \stackrel{width}{11.25}=0.75\stackrel{length}{L}\implies \cfrac{11.25}{0.75}=L\implies 15=L

8 0
3 years ago
PLEASE HELP ME DO THIS
gladu [14]

Answer:

Perimeter = 8x

Step-by-step explanation:

If I can see correctly, the area of the squares are x². Area is just s², so we can find one side by finding the square root of x², which is x. Now that we know that x is one side, we can count the amount of sides and multiply that number by x.

There are 8 sides, so the answer is P = 8x

8 0
3 years ago
A deli serves 6 kinds of lunch meat, 5 kinds of bread, and 4 types of sauce. How many sandwiches can be created with one type of
Vitek1552 [10]
The answer’s the last one, 120
4 0
3 years ago
Read 2 more answers
For e^{-x^2/2}, how would the substitution u=\frac{x}{\sqrt{2}}
Komok [63]
I wish i knew the answer to your question but i don't But you should download photomath in the app store it will help you out with your math it gives you the answer and the work to it
8 0
3 years ago
Other questions:
  • Brian drinks 3 1/2 liters of tea every 2/3 of an hour. how many liters does he drink in one hour
    15·2 answers
  • What is 16+4x less than or equal to 40​
    11·2 answers
  • The wind blew away 28 of your muffins that was 7/10 of all of them how many are left
    5·1 answer
  • Which is the point of intersection when the system of equations below is graphed on the coordinate plane?
    13·1 answer
  • Which of the following expressions is a common factor when the expressions x2 – 9 and x2 – 5x + 6 are factored?
    13·1 answer
  • Um idk if i this is right so pls tell me if it is thx
    15·1 answer
  • Ava wrote the expression StartFraction 4 minus 2 Over 3 minus 1 EndFraction to determine the slope of a line. Which table might
    14·1 answer
  • What is -5 5/8 + 3 1/2
    11·1 answer
  • Divide 17/28 by 2/3 input your answer as a reduced fraction help ASAP
    6·2 answers
  • Is 1 + 1 -15× 20 - 89 + 53 + 82 ÷ 2 + 15 - 12​
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!