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
Korolek [52]
2 years ago
7

When Tomas simplified the expression -2.6 + (-5.4), he got 2.8. what mistake did Tomas likely make?

Mathematics
1 answer:
vladimir2022 [97]2 years ago
5 0

Tomas used incorrectly the rule of signs, the expression should be simplified as follows:

-2.6 + (-5.4)

-2.6 -5.4 = 8

<h3></h3><h3>What mistake did Tomas likely make?</h3>

Here Tomas wants to perform an addition between two numbers:

-2.6 + (-5.4)

And the outcome that Tomas gets is:

-2.6 + (-5.4) = 2.8

Here his mistake seems to bee that he thought the second number was a positive number, and he solved the operation:

-2.6 + 5.4

So, he used wrong the rule of signs.

Remember that the rule of signs says that:

(-)*(+) = (+)*(-) = (-)

Using that, we can rewrite the original expression:

-2.6 + (-5.4)

to:

-2.6 - 5.4

Solving that, we get:

-2.6 - 5.4 = -8

Which is the outcome that Tomas would have gotten if he had used correctly the rule of signs.

If you want to learn more about the rule of signs:

brainly.com/question/13333620

#SPJ1

You might be interested in
A store can buy a monitor for $150.
Dominik [7]

Answer:

$375

Step-by-step explanation:

Step 1: Set up expression

150(1 + 150%)

Step 2: Convert %

150(1 + 1.5)

Step 3: Solve

150(2.5)

375

7 0
2 years ago
PLEASE HELP ASAP WILL GIVE BRAINLIEST!!!!
max2010maxim [7]

Answer:

Step-by-step explanation:

y intercept is -6

the slope is already in it's fraction form but if you want it back to whole number it's y=1.33x-6

the slope is positive

Some plots you can put are (6, 2) and (12, 10)

Just start at (0, -6) and counts 4 up and 3 right

4 0
2 years ago
Please help me! 7 points!! I don’t understand
SVETLANKA909090 [29]

This is adding two vectors, one magnitude 300 direction east, and one magnitude 100 direction 30 degrees northeast.

For the resulting sum we can use the Law of Cosines or just add up the components.  Let's try it both ways.

Components first.   In the east direction we have

300 + 100 cos 30° = 300 + 100(√3/2) = 386.60 miles per hour

In the north direction we have

0 + 100 sin 30° = 100 (1/2) =  50 miles per hour

So a total speed of

sqrt{386.6^2 + 50^2} = 389.82 miles per hour

Answer: 389.82

--------

OK let's try the Law of Cosines.   We have sides 300 and 100 and included angle 150°.

c^2 = 300^2 + 100^2 - 2 (300)(100) \cos 150^\circ

c=\sqrt{151961.52422} = 389.82 \quad\checkmark

5 0
3 years ago
Ok so do I subtract 5 from x and 5 Orr am I solving wrong i don’t know this is confusing.
Aleksandr [31]

Answer:

no you dont

Step-by-step explanation:

4 0
2 years ago
How do you solve this?<br> x/4 divided by_ =x
Ahat [919]

Answer:

good morning baby girl I hope you had fun with you want me money I'm

Step-by-step explanation:

find the attachment of the attachment good morning baby girl I wanted to know how many people will be

4 0
2 years ago
Other questions:
  • What is 32273839 x 427282725253
    15·1 answer
  • Camera costs $940. If the sales tax rate is 4%, what is the total price?
    6·2 answers
  • How to solve the problem
    12·1 answer
  • If I get +16/20 on a test what percentage is that?
    13·2 answers
  • Which is greater than 1/7 or 4/6
    5·2 answers
  • 2w – y = 7w – 2, for w
    5·1 answer
  • I don’t understand how to solve this graph.<br> (Y=MX+B)
    5·1 answer
  • PLEASE HELP ASAP I NEED THIS HW IN A HOUR! I MARK BRAINLIEST! Which data set could be represented by the box plot shown below?
    14·1 answer
  • Please help me ASAP ​
    8·2 answers
  • What is 2x2x4x4 and my name is Jose
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!