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mr Goodwill [35]
2 years ago
12

John needs 20grams of a 54% acid solution for his science project. His school's science lab has 30% solution and bottles of 60%

solution. How much of each should John use?
Mathematics
1 answer:
stepladder [879]2 years ago
3 0

Answer:

If you were to multiply the percentages by the numberws your using to the AB formula you can get the answer 252 B

Step-by-step explanation:

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What is the sum of 7 3/16+3/4​
muminat

Answer:

7 15/16

Step-by-step explanation:

find the same denominator which is 16

3/4x4/4 = 12/16

7 3/16+12/16= 7 15/16

probably bad explanation but hope it helps.. :)

5 0
2 years ago
Read 2 more answers
Find the distance between the points (-5, 0) and (-4, 1).
choli [55]
The formula of a distance between two points A and B is : 

AB=\sqrt{(x_{B}- x_{A})^2 +( y_{B}- y_{A})^2     }

You should this formula by heart.

Then, you just have to apply it ! :D

Here :

x_{A}=-5
y_{A} =0

x_{B} =-4
y_{B}= 1

Therefore :

\sqrt{(-4-(-5))^2+(1-0)^2}
=  \sqrt{1^2+1^2}
= \sqrt{1+1}
= \sqrt{2}

In short, the answer would be the first option : \sqrt{2}.

Hope this helps !

Photon

6 0
3 years ago
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A toaster has 4 slots for bread. Once the toaster is warmed up, it takes 35 seconds to make 4 slices of toast, 70 seconds to mak
Paul [167]

They can make 192 slices of bread in the 7 minute time span.

7 0
2 years ago
A 4 in. by 5 in. photo is enlarged by
Komok [63]

Answer:36

Step-by-step explanation:

multiply by 2.

8x10

perimeter 2l+2w

16+20

36

8 0
3 years ago
Which graph represents the solution to the system of equations y=3x+2 10x+2y=20
Step2247 [10]

Answer:

The graph in the attached figure

Step-by-step explanation:

we have

y=3x+2 ----> equation A

10x+2y=20 ----> equation B

Solve the system by graphing

Remember that the solution of the system is the intersection point both graphs

Using a graphing tool

The intersection point is (1,5)

see the attached figure

therefore

The solution of the system is the point (1,5)

7 0
3 years ago
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