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Sav [38]
2 years ago
6

In an addition equation, when one addend is positive and the other is negative. How do you determine whether the sum will be po

sitive or negative?
Mathematics
1 answer:
Katyanochek1 [597]2 years ago
5 0

If a > b then;

a + -b = a positive number

If b > a then;

a + -b = a negative number

If both addends are positive or if the positive addend has a greater absolute value than the negative addend, the sum will be positive. If both addends are negative or if the negative addend has a greater absolute value than the positive addend, the sum will be negative.

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If The hour hand of a clock moves −30° every hour. How many degrees does it move in 2 ⅕ hours?
Rainbow [258]

Answer:

The hour hand of a clock moves -66* in 2 1/5 hours.

Step-by-step explanation:

2 x -30 = -60, and 1/5 of -30 is -6, and -60-6=-66 degrees.

5 0
3 years ago
Read 2 more answers
What is the solution of the system?
spin [16.1K]
The Answer is b: x = 18, y = -20

Proof:

Solve the following system:
{4 x + 3 y = 12 | (equation 1)
{7 x + 5 y = 26 | (equation 2)

Swap equation 1 with equation 2:
{7 x + 5 y = 26 | (equation 1)
{4 x + 3 y = 12 | (equation 2)

Subtract 4/7 × (equation 1) from equation 2:
{7 x + 5 y = 26 | (equation 1)
{0 x+y/7 = (-20)/7 | (equation 2)

Multiply equation 2 by 7:
{7 x + 5 y = 26 | (equation 1)
{0 x+y = -20 | (equation 2)

Subtract 5 × (equation 2) from equation 1:
{7 x+0 y = 126 | (equation 1)
{0 x+y = -20 | (equation 2)

Divide equation 1 by 7:
{x+0 y = 18 | (equation 1)
{0 x+y = -20 | (equation 2)

Collect results:

Answer: {x = 18, y = -20
6 0
3 years ago
Which table represents a linear function?
kykrilka [37]

Answer:

Option 3 (C)

Step-by-step explanation:

It is the only one that changes the same amount every time ( times 2 )

7 0
3 years ago
Use Distributive Property to Expand: 3x(2x+5)
Ymorist [56]

Answer:

It would become 6x+15x??

8 0
3 years ago
Ramon wants to balance his checking account. He has $2340 in the account. He writes a check for $140. He deposits a check for $2
Sergio039 [100]
He writes a check so he takes out the money so 2340 - 140 and then he deposits so because 2340 - 140 = 2,200 so, when he deposits 2200 + 268 then it will be the answer $2468.


$2468

I had this question yesterday or the other day so yeah hope this helps! ^^
5 0
3 years ago
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