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solmaris [256]
3 years ago
8

When is the estimation of products a useful tool?

Mathematics
1 answer:
Nadya [2.5K]3 years ago
3 0
When the numbers are either too big, or you just want a close product. Such as 1370 and 1547. Round to the nearest number then add to the other.
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Solve 15x+3y=9,10x+7y=-4
TiliK225 [7]

Answer:

x = 1, y = -2

Step-by-step explanation:

15x + 3y = 9 (1)

10x + 7y = -4 (2)

3 × (2) - 2 × (1)

3 × (2)

30x + 21y = -12 (3)

2 × (1)

30x + 6y = 18 (4)

(3) - (4)

15y = -30

y = -30 / 15

y = -2

sub y = -2 into (1)

15x + 3y = 9

15x + (3 × -2) = 9

15x - 6 = 9

15x = 9 + 6

15x = 15

x = 15 / 15

x = 1

4 0
3 years ago
Juanita is making bread. She needs 3 1/2 cups of flour. Juanita only has 1/4 measuring cup. How many cups of flour will Juanita
jekas [21]

Answer:

if she uses a 1/4 measuring cup she would need to get 14 1/4 cups of flour

Step-by-step explanation:

7 0
3 years ago
Darren's rectangle measures 3 1/3 units by 3 1/3 units. What is its area?
Andrei [34K]

Answer:

11 1/9

Step-by-step explanation:

3 1/3 x 3 1/3

= 10/3 x 10/3

= 100/9

= 11 1/9

4 0
2 years ago
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kati45 [8]

Answer:

b 2x

Step-by-step explanation:

4 0
2 years ago
Read 2 more answers
Solve for x: 3-(2x-5)<-4(x+2)
andriy [413]
3-(2x-5)<-4(x+2)

8-2x<-8-4x

16<-2x

-8 > x. or equivalently x<-8
3 0
3 years ago
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