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
OlgaM077 [116]
2 years ago
6

Over the past week, 40% of the phone calls to Alicia's cell phone were from her son. Let's say you know that her son called her

12 times. Find out how many total calls she received.
Mathematics
1 answer:
ale4655 [162]2 years ago
5 0

She received 12 calls from her son and 30 calls in total.

40% of 30 is 12.

You might be interested in
What us 2 1/3 divided by 1 1/2 in mixed number form?
notka56 [123]

33/14 =2 5/14

Step-by-step explanation:

have a great day

3 0
2 years ago
Surface area???????????
MAVERICK [17]

Answer:

The option B is the correct answer. 79.18 m²

Step-by-step explanation:

Surface area = Base area +  Lateral surface area

Area of triangle = bh/2

b - base and h - height

<u>To find the base area</u>

We can consider the base is a hexagon.

A regular hexagon is a combination of 6 equilateral  triangle

Base area = 6 * area of triangle

base b = 3

<u>To find the height</u>

h =√[(6.2)² - (5.6)₂] = 2.7

Area of triangle bh/2 = (3 * 2.7)/2 = 3.99

Area of base = 23.95

To find lateral surface area

Lateral surface area = 6 * area of triangle

Area of triangle = bh/2 =(3 *6.2)/2 = 9.3

Lateral surface area = 6 * 9.3 = 55.8

<u>To find the total surface area </u>

Total surface area = Base area + lateral surface area = 23.95 + 55.8

= 79.75 m²

Therefore the option B is the correct answer. 79.18 m²

7 0
3 years ago
I need explanations for Mathematical Proofs.
erma4kov [3.2K]

Answer:

Proofs employ logic expressed in mathematical symbols, along with natural language which usually admits some ambiguity. In most mathematical literature, proofs are written in terms of rigorous informal logic.

According to Bleiler-Baxter & Pair [22], for a mathematician, a proof serves to convince or justify that a certain statement is true. But it also helps to increase the understanding of the result and the related concepts. That is why a proof also has the role of explanation.

There are many different ways to go about proving something, we'll discuss 3 methods: direct proof, proof by contradiction, proof by induction. We'll talk about what each of these proofs are, when and how they're used. Before diving in, we'll need to explain some terminology.

Although I will focus on proofs in mathematical education per the topic of the question, first and foremost proofs are so hard because they involve taking a hypothesis and attempting to prove or disprove it by finding a counterexample. There are many such hypotheses that have (had) serious monetary rewards available.

In logic and mathematics, a formal proof or derivation is a finite sequence of sentences (called well-formed formulas in the case of a formal language), each of which is an axiom, an assumption, or follows from the preceding sentences in the sequence by a rule of inference.

All mathematicians in the study considered proofs valuable for students because they offer students new methods, important concepts and exercise in logical reasoning needed in problem solving. The study shows that some mathematicians consider proving and problem solving almost as the same kind of activities.

More information for you..

https://youtu.be/V5tUc-J124s

https://youtu.be/dMn5w4_ztSw

\color{yellow}{}

3 0
3 years ago
How do you do this problem 7-r=8-r-r​
Oliga [24]

Answer:

r = 1

Step-by-step explanation:

Solve for  r

by simplifying both sides of the equation, then isolating the variable.

3 0
2 years ago
Read 2 more answers
Translate the following sentence into equations <br> •Three less than "x" is equal to 13
Vikentia [17]
3 less then x.......x - 3
is equal to 13...= 13

x - 3 = 13 <==
3 0
3 years ago
Other questions:
  • Suppose a spider moves along the edge of a circular web at a distance of 3cm from the center.
    8·1 answer
  • Javier is also kayaking, he can go 1 mild in 2/3 of an hour. How far can he go at this rate in 3 hours?
    11·1 answer
  • For questions 5-6, find the regression equation that best models the data shown in the table.
    7·1 answer
  • How do I find c?<br> I keep trying with my calculator and it just won’t work
    13·1 answer
  • Just help me please don’t ignore me
    12·1 answer
  • Algebra help please answer
    8·1 answer
  • Help me with this question pleaseee
    7·1 answer
  • Helppppp<br> me anyone :(
    12·2 answers
  • Sorry its blurry but please hurry!!!!!!! Answer 9 and 10 please!!!!
    8·1 answer
  • a hardware store marks up the price of all tools it gets from the ware house by 18% and then puts them on sale for 20% off what
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!