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
Sergeeva-Olga [200]
3 years ago
14

Im kinda confused ;-;​

Mathematics
2 answers:
Ivan3 years ago
7 0

Answer:

42-38

42 + (-38)

-38+42

Step-by-step explanation:

In all of these expressions, the 38 has to be negative because that is what you're taking away from the 48. When you have -(- it turns into a +.

In -42 + 38 the 42 is negative, but that is Emma's total amount so it's positive

With -42 -(-38) they did the just added those two together which would make the 42 still negative and the 38 positive.

THen with 42 + 38 the 38 is being subtracted from what she has so you would not add 38 to her total.

s2008m [1.1K]3 years ago
5 0
Ngl wish I was smart like that ^^ was mad confused tryna see
You might be interested in
Carmen has a sign with dimensions 5 ft × 7.5 ft. She wants to reduce it to make a postcard. Postcard sizes are 3.5 in. × 5 in.,
prisoha [69]

Answer:

The size of the post card she should use is 4 in. × 6 in.

Step-by-step explanation:

The parameters given are;

Dimensions of sign = 5 ft. × 7.5 ft

Hence, the ratio of the side sizes are;

5:7.5 which is the same as 2:3, therefore, to obtain the most accurate design of the sign on the post card, the size of the post card must be in direct proportion to the size of the sign which gives;

Side length ratio of post card = 2:3 = 4:6 = 4 in. × 6 in.

The size of the post card she should use is therefore = 4 in. × 6 in.

6 0
3 years ago
I am going to buy exotic fruits. Dragonfruit costs $x-4$ dollars. Starfruit is five dollars less expensive than rambutan. Rambut
soldier1979 [14.2K]
We can represent the Rambutan as x-4+2x or 3x-4 because it costs 2x dollars more than the Dragonfruit. 

We can represent the Starfruit as 3x-4-5 or 3x-9 because it costs 5 dollars less than the Rambutan

Therefore the overall equation would be:
(3x-4)+2(3x-9)+3(x-4) (distribute)
3x-4+6x-18+3x-12 (combine like terms)
12x-34 

Hope this helps
8 0
3 years ago
By what percent will the product of two numbers decrease if one of them is decreased by 25% and the other one is decreased by 50
olchik [2.2K]
Well, let's say the numbers are "a" and "b"

so a * b = ab

ok... now, if we reduce "a" by 25%, that means the new size is just 75% of the old one, how much is 75% of a? well, (75/100) * a, or 0.75a

now let's reduce "b" by 50%, that means the new size is 50% or half,  how much is 50% of b? well (50/100)*b, or 0.5b

\bf \begin{cases}
a\cdot b\implies  ab\\
0.75a\cdot 0.5b\\
\qquad 0.75\cdot 0.5ab\\
\qquad 0.375ab
\end{cases}

now, the new size of "ab" is just 0.375ab... well, let's revert the decimal format by simply multiplying by 100

0.375 * 100, is 37.5%

the new size of "ab" is just 37.5% of the original "ab"

it decreased by 100 - 37.5 or 62.5%
5 0
3 years ago
If the measure of angle AOB = 2x + 4 and the measure of angle COD = 4x - 10, write an equation for solve for x
poizon [28]

Answer:

2x+4=4x-10

Step-by-step explanation:

AOB and COD are same

3 0
3 years ago
Read 2 more answers
Jamaal has 20 models of cars and planes. He has 3 times as many cars as planes. What is the ratio of cars to total models?
DENIUS [597]
Jamaal has 20 models of cars and planes. He has 3 times as many cars as planes. What is the ratio of cars to total models? Mutiply its what 20X20X20
6 0
3 years ago
Read 2 more answers
Other questions:
  • Which equation is related to 58 = x + 25?
    12·1 answer
  • PLEASE HELP?!
    10·2 answers
  • I need help please how do you solve 3( x - 1/3 ) = 52
    12·1 answer
  • -17 -5(X+3) = 3x solve
    15·1 answer
  • Please help please help
    13·1 answer
  • Two trains leave a station at the same time, one traveling west at a rate of 60km/h, and the other traveling east at 55km/h. In
    11·1 answer
  • Pls help, it's a timed quiz
    8·1 answer
  • Please help quick!! i’ll give brainliest!!
    6·1 answer
  • 7x + 1039 = 245x<br> Please help!
    13·2 answers
  • Which term describes BCD
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!