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earnstyle [38]
3 years ago
9

Write two subtraction equations to show how to find 15-7

Mathematics
1 answer:
choli [55]3 years ago
6 0
You could make 15 lines and cross out 7 and see what you end up with or make a rectangle and make 14 lines so there are 15 lines/boxes then shade 7 and see how many are not shaded...... the answer is 8 
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Solve the system of equations algebraically.
Sveta_85 [38]

Answer:

x = -7 , y = 5 thus D)

Step-by-step explanation:

Solve the following system:

{4 x - 4 y = -48 | (equation 1)

5 x - 6 y = -65 | (equation 2)

Swap equation 1 with equation 2:

{5 x - 6 y = -65 | (equation 1)

4 x - 4 y = -48 | (equation 2)

Subtract 4/5 × (equation 1) from equation 2:

{5 x - 6 y = -65 | (equation 1)

0 x+(4 y)/5 = 4 | (equation 2)

Multiply equation 2 by 5/4:

{5 x - 6 y = -65 | (equation 1)

0 x+y = 5 | (equation 2)

Add 6 × (equation 2) to equation 1:

{5 x+0 y = -35 | (equation 1)

0 x+y = 5 | (equation 2)

Divide equation 1 by 5:

{x+0 y = -7 | (equation 1)

0 x+y = 5 | (equation 2)

Collect results:

Answer:  {x = -7 , y = 5

7 0
4 years ago
Challenge You buy 3.18 pounds of apples, 1.25 pounds of peaches, and 1.76 pounds of pears.
loris [4]

Answer:

6.19

Step-by-step explanation:

I hope this helps you

6 0
3 years ago
Angel is making bags of trail mix for hiking club. He will use 20 ounces of walnuts, 11.2 ounces of almonds, and 14.3 ounces of
zheka24 [161]

Answer:

1.82 oz.

Step-by-step explanation:

20 oz. walnuts/25 bags = 0.8

11.2 oz. almonds/25 bags = 0.448

14.3 oz. cashews/25 bags= 0.572

8 0
3 years ago
3. Which equation can not be derived from the equation given below?
daser333 [38]

Answer:

Option A is the correct answer

A.x=2a(b-y)

Step-by-step explanation:

Reason: 2a is not a coefficient of y.

Hope it helps you in your learning process.

7 0
2 years ago
This week, 300 tickets were sold to the school play. This is 120 percent of the number of tickets sold last week. How many ticke
fenix001 [56]

Answer:

300=120/100* number of tickets sold last week.

So last week's number of tickets=300÷(120/100)=300*100/120=30*100/12=5*100/2=5*50=250 tickets

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
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