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
il63 [147K]
3 years ago
9

Evaluate the expression using the order of operation (13.1 times 3) + 5.21

Mathematics
1 answer:
GREYUIT [131]3 years ago
7 0
13.1 times 3 is 39.3 +5.21 =44.51
You might be interested in
Find the next 3 terms 15 21 27 33 39​
djyliett [7]

Answer:

<em>45, 51 and 57</em>

Step-by-step explanation:

its +6 each time so,

45

51

and

57

3 0
3 years ago
Read 2 more answers
21 Last year Chelsea and Sonya took 236 pictures during Thanksgiving. This year Chelsea and Sonya each took the same amount of p
Leokris [45]

Let 'c' represent the number of pictures Chelsea took.

Let 's' represent the number of pictures Sonya took.

For last year's Thanksgiving, c + s = 236

For this year's Thanksgiving, let 'x' represent the number of photos taken in total. x = c + s, where c and s are two integers that are the same (c = s).

And we know that for both years, c + s + x = 500.

As we know that c + s is already 236 from last year, we can remove c + s from the equation in bold and replace it with 236 instead.

236 + x = 500.

Now we have to isolate the x term.

x = 500 - 236

x = 264.

We know that x = c + s, where c and s are the same, so we can just use one of the variables and double it (so you either get 2c or 2s - it doesn't matter which one you pick because they're both the same).

2c = 264

c = 132

c = s

s = 132.

Both took 132 pictures this year.

4 0
3 years ago
this James has four square foot bulletin board in a 10 square-foot bulletin board she wants to cover both boards with index card
IceJOKER [234]

Answer:

Step-by-step explanation:

6 0
3 years ago
Plz help people who are good at math
seropon [69]

Answer:

<ABC

Step-by-step explanation:

When you use three points, two points must be on the rays of the anlge. The middle point must be the vertex.

Answer: <ABC

6 0
3 years ago
Read 2 more answers
Sarah needs 30 liters of a 25% acid solution how many liters of the 10% and the 30% acid solutions should she mix to get what sh
sweet-ann [11.9K]

Answer:

7.5 L of 10% solution and 22.5 L of 30% solution

Step-by-step explanation:

Volume of 10% solution plus volume of 30% solution = total volume of 25% volume.

x + y = 30

Acid in 10% solution plus acid in 30% solution = total acid in 25% solution.

0.10 x + 0.30 y = 30 × 0.25

0.10 x + 0.30 y = 7.5

Solve the system of equations, using either substitution or elimination.  I'll use substitution:

x = 30 − y

0.10 (30 − y) + 0.30 y = 7.5

3 − 0.10 y + 0.30 y = 7.5

0.20 y = 4.5

y = 22.5

x = 30 − y

x = 7.5

Sarah needs 7.5 L of 10% solution and 22.5 L of 30% solution.

8 0
3 years ago
Read 2 more answers
Other questions:
  • HELP HELP <br> FIND THE VOLUME OF THE COMPOSITE SOLId
    8·1 answer
  • What is the answer to the question
    13·2 answers
  • { y = x + 5 ,4x + y =20 }
    15·1 answer
  • 10 fish are in a tank, 3 fish drown, how many fish are left?
    14·2 answers
  • Andre is painting the recreation center as part of a volunteer project. The game
    13·1 answer
  • How to graph 2x-3y=-6
    12·1 answer
  • Find the midpoint of (1,8) and (9,6)
    15·1 answer
  • A person 6ft tall stands 10ft from point P directly beneath a lantern hanging 30 ft above the ground. The lantern start to fall,
    6·1 answer
  • The composite figure is made up of a parallelogram and a rectangle. Find the
    13·1 answer
  • Which function has a constant additive rate of change of 14
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!