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Tresset [83]
2 years ago
12

Subs

Mathematics
1 answer:
emmasim [6.3K]2 years ago
3 0

Answer:

well you see there is a high possibility that it is your mums shopping list.

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Please help me I don’t understand how to do it. If you can please use a data table to explain how to do it.
Ksivusya [100]

Answer:

The 70% mixture makes up 0.7 liters of the solution whereas the 60% mixture makes up 2.8 liters of the solution.

Step-by-step explanation:

Let us have x liters of the .7 mixture and y liters of the .6 mixture.

We want total liters to be 3.5 which means we need x+y=3.5 . I don't like the decimal in the equation so I'm going to multiply both sides by 10: 10x+10y=35

We also need the .7x+.6y=.62(3.5) . I hate the decimal business going on in this question so I'm going to multiply by 1000 which gives 700x+600y=62(35) .

So we have the system

700x+600y=62(35)

10x+10y=35

I'm going to setup this up for linear combination/elimination.

Multiply bottom equation by 60.

700x+600y=62(35)

600x+600y=60(35)

Subtract equations (bottom from top):

(700-600)x+(600-600)y=35(62-60)

Simplify:

100x+0y=35(2)

100x=70

Divide both sides by 100:

x=70/100

x=7/10

Going back to x+y=3.5 along with x=7/10 or .7 liters to find y.

y=3.5-x with x=.7

y=3.5-0.7

y=2.8

The 70% mixture makes up 0.7 liters of the solution whereas the 60% mixture makes up 2.8 liters of the solution.

Pic added.

Another way to do problem:

.7x+.6(3.5-x)=.62(3.5)

Multiply and distribute:

.7x+2.1-.6x=2.17

Combine like terms on left:

.1x+2.1=2.17

Subtract 2.1 on both sides:

.1x=.07

Multiply both sides by 10:

x=0.7 liters

Now the other acid solution is 3.5-0.7 which is 2.8 litera.

4 0
3 years ago
Pwease help ..........................................
gayaneshka [121]

Answer:

29.97cm

Step-by-step explanation:

16.99

8.33

4.65

______+

29.97

8 0
2 years ago
Read 2 more answers
MATH TEST PLEASE HELP ASAP
Lunna [17]

Answer:

1734

Step-by-step explanation:

3 times 17 to find the number of feet =51

51 time $34 (the price per foot  ) to find total

8 0
2 years ago
The property of inequality states whatever is done to one side of the equation must be done to the other. true or false?
weqwewe [10]
This is true. The word equal in equality will help, each side of the equation in the in(equal)ity should be done the same.
3 0
3 years ago
Solve the following word problems.
aleksandr82 [10.1K]

Answer:

Step-by-step explanation:

Let a , b , c & d be the no. of chairs in hall A , B , C & D respectively.

Given,

b = 4a

c = a + 15

d = a + 8 + 4a = 5a + 8

Now,

Total no. of chairs (T) = a + b + c + d

                                   = a + 4a + a + 15 + 5a + 8

                                   = 11a + 23

Now,

Average chairs in each hall (Avg) = T/4

                                                       = (11a + 23)/4

7 0
3 years ago
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