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den301095 [7]
3 years ago
7

How does knowing 8+5=13 help you solve 13-5?​

Mathematics
2 answers:
amid [387]3 years ago
8 0

Answer:

Fact Families

Step-by-step explanation:

They are fact families

insens350 [35]3 years ago
7 0

Answer:

because 8 + 5 = 13 which means that 13-5 =8

Step-by-step explanation:

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Which of the following problems can be solved using the equation below?<br> x+15=2x
pshichka [43]

Answer:

Answer is below

Step-by-step explanation:

Subtract 2x from both sides.

x+15-2x=2x-2x\\-x+15=0

Subtract 15 from both sides.

-x+15-15=0-15\\-x=-15

Divide both sides by -1.

\frac{-x}{-1}=\frac{-15}{-1} \\x=15

So therefore your answer is 15

6 0
3 years ago
Solve the equation. Check your solutions when necessary.<br><br><br>2x² − 7x = 4
prisoha [69]

Answer:

x= -1/2 = -0.500

x=4

Step-by-step explanation:

2x^2-7x-4=0

2x^2-8x+1x-4=0

2x(x-4)+1(x-4)=0

(2x+1)(x-4)=0

2x+1=0...2x= -1.. x= -1/2         x-4=0 .. x=4

checking the solution

2(-1/2)^2-7(-1/2)=4.....  4=4

2(4)^2-7(4)=4....... 4=4

5 0
3 years ago
1.
oksian1 [2.3K]

Answer:

Answer is 2

{ \rm{4x + 2 > 10}} \\  \\ { \rm{4x < 8}} \\  \\ { \rm{x < 2}}

6 0
2 years ago
Read 2 more answers
How do i solve this problem?
Dominik [7]

Answer:

Step-by-step explanation:

surface area of one  can 2πrh+2πr²

=2πr(h+r)

≈2×3.14×3/2(4.25+1.5)

≈9.42(5.75)

≈54.165 in²

number of cans=1000/54.165

=18 cans

material used=18×54.165≈975 in²

material left=1000-975=25 in²

3 0
3 years ago
What is the answer<br> -8 + 3 + -8 – -3
Sophie [7]
-8+3+-8--3
minusing a negativ means adding a positive
adding a negaative means minusing a positive
-8+3-8+3
-5-8+3
-13+3
-10
6 0
3 years ago
Read 2 more answers
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