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
Nana76 [90]
3 years ago
9

Suppose you cannot remember the answer to 15-8=7. What could you do to solve?

Mathematics
2 answers:
Sveta_85 [38]3 years ago
3 0

You can think in reverse. Addition is the opposite of subtraction. So to solve 15-8, you can ask "8 plus what number is equal to 15?" and note how 8+7 = 15. So that's why 15-8 = 7. Similarly, 15-7 = 8 can be solved the same way.

Delvig [45]3 years ago
3 0

Calculate either in your head or on a paper what plus 8 equals 15, you can solve it easily this way. It is probably easier to do in your head (9, 10, 11, ...), continue on and make sure to remember how much is the sum.

You might be interested in
Chloe was x inches tall on her birthday last year. This year she is 2.5 inches taller. Select all of the following expressions t
Lubov Fominskaja [6]
X+2.5 because you dont know her height of last year which would give you the variable X and this year she grew 2.5 inches which would make the equation X+2.5 
<span />
6 0
3 years ago
a trapezoid has base lengths of 6 and 15 centimeters with an area of 136.5 square centimeters. What is the height of the trapezo
MrRa [10]
•*Ok first let me show you the formula for the Area of the trapezoid.
A=a+b/2 h.(I will be using the letter x for the multiplication sign)
 
*And here is the formula to find the height of a trapezoid
h=2 x A/a+b (2 times the Area over base "a" plus base "b")


*We need to plug in the numbers: h = 2 x 136.5/6+15
*Next, we add the two bases to get 21: 6+15=21 (h=2 x 136.5)  
*Then, divide the total of the two bases (21) from the area to get 6.5: 136.5/21-6.5
*Finally we multiply 2 by 6.5: 2 x 6.5= 13
The height if this trapezoid is 13.

Hope this helps you ☺
3 0
3 years ago
3( 2x - 9) + 15 = 60
GarryVolchara [31]

Answer:One solution was found : x = 12. Rearrange: Rearrange the equation by subtracting what is to the right of the equal sign from both sides of the ...

Step-by-step explanation:

8 0
3 years ago
Lynn can type 1,650 words in 30 minutes. <br> What is her typing rate, in words per minute?
Marianna [84]
55 words per minute

1650/30 = 55
7 0
3 years ago
Read 2 more answers
83 simplified<br> whoever gets it right is the brainliest
Alina [70]
83 is a whole number and cannot be simplified.
8 0
3 years ago
Read 2 more answers
Other questions:
  • what is the probability that a red or green marble will be selected from a bag containing 9 red marbles, 7 green marbles, and 11
    14·1 answer
  • Solve the problem...
    12·1 answer
  • How do you prove that AM=1/2AB if what is given is M is the midpoint of line AB? 7 steps.
    8·1 answer
  • Find the answers from the questions that are shown below
    10·1 answer
  • Which expression is equivalent to the given expression?
    13·1 answer
  • 50 points!! Please help!! Will mark brainliest and random answers will be reported
    5·2 answers
  • Anyone know the answer? I’ll give you brain list if you get it right.
    5·1 answer
  • 25% of 560 is what number
    10·2 answers
  • A. x = 20, mZH = 62°, mZI = 89°, mZJ = 69°
    15·1 answer
  • What is the surface area of a sphere with a radius of 15 cm?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!