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adoni [48]
3 years ago
6

How do u do this it's something about solving proportions and I have no idea how to do this plz help

Mathematics
1 answer:
Yakvenalex [24]3 years ago
8 0
Simple...what fun!

To solve for this type of problem...it's real simple!

I will show you the easiest and fastest way to solve...

so..you have...

\frac{2}{5} = \frac{x}{35}

Just..CROSS MULTIPLY!!

2*35=70
and
5*x=5x

Leaving you with....

5x=70

Easy...now divide!!

\frac{5x}{5} = \frac{70}{5}

x=14

To check your work...plug it in....

\frac{2}{5} = \frac{14}{35}

simplify...

14/7=2

and

35/7=5

Thus, your answer.


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Can someone plz help me solved this problem I need help plz help me! Will mark you as brainiest!
I am Lyosha [343]

Answer:

13 l of 15%, 13 l of 25%, 26 l of 70%

Step-by-step explanation:

solutions:

  • 15%, 25% and 70%

final solution:

  • 52 l of 45%

This includes 0.45*52l= 23.4 l acid

Let's assume:

  • amount of 15% solution= x
  • amount of 25% solution= y
  • amount of 70% solution= z
  • and we have z=2y

so there are 2 equation:

  • x+y+z=52
  • 0.15x+0.25y+0.7z=23.4

or

  • x+y+2y= 52 ⇒ x+3y= 52 ⇒ x= 52- 3y
  • 0.15x+0.25y+1.4y=23.4
  • 0.15x+1.65y=23.4
  • 0.15*(52-3y)+1.65y=23.4
  • 7.8-0.45y+1.65y=23.4
  • 1.2y=23.4-7.8
  • 1.2y= 15.6
  • y=15.6/1.2
  • y= 13 l

--------

  • x= 52- 3*13= 13 l
  • z= 2y= 2*13= 26 l
6 0
4 years ago
Y= -3x - 1 for x= 5????
adell [148]

Answer:

y= -16

Step-by-step explanation:

Y= -3x - 1

Let x = 5

y = -3(5) -1

y = -15-1

y = -16

7 0
3 years ago
Read 2 more answers
Bob earns $66,500 a year. Find Bob’s semi-monthly gross pay
Sergio039 [100]

Answer: 5541.66

Step-by-step explanation:5

so i did 66,500 / 12 and that gave me 5541.66 than i rounded it to 5542 but that went over so it was 5541.66

hoped this helped lmk if it did

4 0
3 years ago
Square tablecloth has a perimeter of 12 feet what is the area of the tablecloth
Marizza181 [45]
To find the area of a square, do base times height.

If it is a square then all the sides are equal. Take 12 and divide it by 4 to find out that each side is 4 feet.

Base-4
Height-4

(4)(4)=16

6 0
3 years ago
Carmelo's employer matches 15% of carmelos contributions to his 401(k) plan. if carmelos employer contributed $300 to the plan l
Rzqust [24]
300 is 15% of 2000. The answer is $2000.
6 0
3 years ago
Read 2 more answers
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