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
nikitadnepr [17]
3 years ago
9

X^2−1.78x, if x=2.78

Mathematics
1 answer:
Readme [11.4K]3 years ago
8 0

Answer:

2.78

Step-by-step explanation:

We are given the expression x^2-1.78x

As we know that x=2.78, we can plug that value into the expression and simplify it

(2.78)^2-1.78(2.78)\\\\7.7284-4.9484\\\\2.78

You might be interested in
I only need help with the third one​
Paladinen [302]

Answer:

240

Step-by-step explanation:

12/100 X 2000

=240

the answer is 240

5 0
3 years ago
Read 2 more answers
A shoe company found that 4.25% of the production is defective. The company
nlexa [21]

1190 pairs of shoes are defective

<em><u>Solution:</u></em>

Given that shoe company found that 4.25% of the production is defective

The company  made 28,000 pairs of shoes

To find: Number of pairs of defective shoes

From given information, 4.25% of the production is defective which means 4.25% of 28,000 pairs of shoes

Defective shoes = 4.25% of 28,000

Defective shoes = \frac{4.25}{100} \times 28000

Defective shoes = 4.25 \times 280 = 1190

Thus 1190 pairs of shoes were defective

6 0
3 years ago
20 POINTS
chubhunter [2.5K]
Answer: 2 inches, 3 inches, or 3.125 and 2.083


Explanations:
The simplest way is to take 20% of the 2.5 inches and go that much above & below 2.5 inches.

2.5 x 20% = 2.5 x 0.20 = 0.5

So 2.5 - 0.5 = 2 inches was predicted
And 2.5 + 0.5 = 3 inches was predicted.

The more complicated way is to see number + 20% of that number = 2.5, and what number - 20% = 2.5.

Which solution sounds more like what you’re doing in class right now?

If it’s the more complicated way:

0.8x = 2.5 (80% of the predicted rain value equals 2.5)
x = 3.125 inches was predicted

1.2x = 2.5 (120% of the predicted rain value equals 2.5)
x = 2.083 inches was predicted

Sorry, this is probably confusing. Let me know what questions you have.
6 0
3 years ago
Here are two shapes with the same area. Work out the perimiter of the rectangle.
Lilit [14]
So, we know the perimeter is 24 cm. and the top part is the left part, (x) + 2, but remember, we need to have it be a number that, multiplied by 2, is 24. So, using this formula, the length, (top / bottom) is 7, and x = 5. Because 5 + 5 = 10, and when length is +2, it adds up to 14. 10 + 14 = 24. So, length is 7, width, (left, right) is 5.
3 0
3 years ago
What is the result if 3x-9 is evaluated when x = -5?​
Anton [14]

Answer:

Step-by-step explanation:

I wonder if it is the minus that is causing the problem?

Let x = - 5

3*(-5) - 9

-15 - 9

This is a money question. If you are 15 dollars in debt and you spend another 9, where are you? (In the company of the American government. They do this all the time).

- 15 - 9 = - 24

5 0
3 years ago
Other questions:
  • Kiara baked 30 oatmeal cookies and 48 chocolate chip cookies to package in plastic containers for her friends at school. She wan
    15·2 answers
  • Which relation is a function?
    11·2 answers
  • The measure of an angle is 63.6°. what is the measure of a complementary angle
    15·2 answers
  • ASAP PLZ HELP 1 EASY QUESTION HELP :/
    12·1 answer
  • A catering company prepared and served 300 meals at an anniversary celebration last week using eight workers. The week before, s
    5·1 answer
  • How many password are possible if you want to use 5 letters and they cannot be repeated.
    6·1 answer
  • BRAINLIEST FOR CORRECT
    13·2 answers
  • The differences of 4 and a number x is 14
    11·2 answers
  • The two lines represent the distance traveled by Noah and Diego. Which person is running more quickly? Explain how you know.
    14·1 answer
  • Gabe is analyzing the plane ticket prices over the years. Comparing the cost of a plane ticket this year to last year, ticket pr
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!