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
Wewaii [24]
3 years ago
7

Evaluate the expression when c=4. 4c−7.8 = ???????

Mathematics
2 answers:
vesna_86 [32]3 years ago
7 0

Answer:

8.2

Step-by-step explanation:

4(4)-7.8

ivanzaharov [21]3 years ago
7 0

So if c=4, the equation will be (4 × 4) - 7.8. Use PEMDAS (parenthesis, exponents, multiplication, division, addition, & subtraction) to solve.

4 × 4 = 16

16 - 7.8 = 8.2

<h2>Answer:</h2>

4(c) - 7.8 when c = 4 equals 8.2.

I hope this helps :)

You might be interested in
Complete the square <br> x^2+4-12=0
Tatiana [17]

Answer:

x = -6

x = 2

Step-by-step explanation:

x² + 4 - 12 = 0

= (x + 6)(x - 2)

x + 6 = 0

x = -6

x - 2 = 0

x = 2

5 0
3 years ago
7! What does this mean?
7nadin3 [17]

Answer:

5040

Step-by-step explanation:

7!

= 1 × 2 × 3 × 4 × 5 × 6 × 7

= 5040

5 0
3 years ago
A sample of 25 undergraduates reported the following dollar amounts of entertainment expenses last year:
marin [14]

Answer:

Range = 85

\sigma = 28.71

Interval = [666.78, 781.62]

Step-by-step explanation:

Given

The data for 25 undergraduates

Solving (a): Range and Standard deviation

The range is:

Range = Highest - Least

From the dataset:

Highest = 772

Least = 687

So:

Range = Highest - Least

Range = 772-687

Range = 85

The standard deviation is:

\sigma = \sqrt{\frac{\sum(x - \bar x)^2}{n}}

First, calculate the mean

\bar x = \frac{769 +691 +............+715}{25}

\bar x = \frac{18105}{25}

\bar x = 724.2

So, the standard deviation is:

\sigma = \sqrt{\frac{(769-724.2)^2 +(691-724.2)^2 +(699-724.2)^2 +(730-724.2)^2 +............+(715-724.2)^2}{25}}

\sigma = \sqrt{\frac{20604}{25}}

\sigma = \sqrt{824.16}

\sigma = 28.71

Solving (b): The interval of the 95% of the observation.

Using the emperical rule, we have:

Interval = [\bar x - 2*\sigma, \bar x+ 2*\sigma]

Interval = [724.2 - 2*28.71, 724.2 + 2*28.71]

Interval = [666.78, 781.62]

4 0
3 years ago
Help me out please i need help im usure whats the answer
kkurt [141]
The answer is 80 because the answer for all three sides should be 180
6 0
3 years ago
Read 2 more answers
Chanda Spent $2.55 for three bottles of juice. Write and solve an equation to find the cost of 1 bottle
In-s [12.5K]

Answer: 0.85

Step-by-step explanation:

2.55/3

6 0
3 years ago
Read 2 more answers
Other questions:
  • Monica sells lemonade over the summer and uses conical paper cups to serve
    10·1 answer
  • Rewrite 6 3/4 as an improper fraction
    6·2 answers
  • 12.68 is greater than 12.8 because 68 is greater than 8.” Is she correct?
    5·1 answer
  • How many more pennies were produced that year than half year
    9·1 answer
  • A truck is bought at the price of $67,000. The price decreases at the rate of .30 every year (t). Which equation matches this ex
    13·2 answers
  • Simplify the expression<br><br> 14+2y+3-6y
    8·2 answers
  • The question <br> Najheheggebbsbv nhsygenbs
    14·1 answer
  • Write 0.0073 as a percent.
    15·2 answers
  • Bella, Tia, and Ron participate in a trivia contest at a book shop. Tia scores 4 points, Ron scores 3 points, and Bella scores 2
    14·1 answer
  • Hard question need help My mom is mad please help Middle school will like and give brainliest
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!