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maxonik [38]
3 years ago
14

Which sums are equal to -9+21? Choose

Mathematics
2 answers:
xenn [34]3 years ago
8 0

Answer:

A and C

Step-by-step explanation:

-9 + 21 = 12

Option A:

21 + (-9)

21 - 9

12 TRUE

Option B:

9 + (-21)

9 - 21

-12 FALSE

Option C:

(-9) + 9 + 12

0 + 12

12 TRUE

Option D:

-(9 + 21)

-(30)

-30 FALSE

Option E:

(-9) + (-21)

-9 - 21

-30 FALSE

Best of Luck!

tekilochka [14]3 years ago
6 0

Answer:

A, C

Step-by-step explanation:

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One garden had 5 times as many raspberry bushes as a second garden. After 22 bushes are transplanted from the first garden to th
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Let the number of raspberry bushes in one garden = x

And the number of raspberry bushes in second garden = y

Garden one has 5 times as many raspberry bushes as second garden,

So the equation will be,

x = 5y -------(1)

If 22 bushes were transplanted from garden one to the second, number of bushes in both the garden becomes same,

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x - y = 22 + 22

x - y = 44 ------(2)

Substitute the value of x from equation (1) to equation (2)

5y - y = 44

4y = 44

y = 11

Substitute the value of 'y' in equation (1),

x = 5(11)

x = 55

Therefore, Number of bushes in garden one were 55 and in second garden 11 originally.

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I need a lil help here (18 points!!!!!)
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