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finlep [7]
3 years ago
13

Measuring Volume - Overdue -

Mathematics
1 answer:
SOVA2 [1]3 years ago
3 0

Answer:28

Step-by-step explanation:

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Solve the simultaneous equations
Contact [7]

Answer:

The solution for given system of equations is: x = 6 and y = 3

Or

(6,3)

Step-by-step explanation:

Given equations are:

3x+4y=30\ \ \ Eqn\ 1\\3x-y=15\ \ \ \ Eqn\ 2

There are three methods to solve simultaneous equations

  1. Elimination
  2. Substitution
  3. Co-efficient method

We will use the elimination method as the coefficients of x in both equations are already same

Subtracting equation 2 from equation 1

3x+4y - (3x-y) = 30-15\\3x+4y-3x+y = 15\\5y = 15\\\frac{5y}{5} = \frac{15}{5}\\y = 3

Putting y = 3 in equation 2

3x-3 = 15\\3x = 15+3\\3x = 18\\\frac{3x}{3} = \frac{18}{3}\\x =  6

Hence,

The solution for given system of equations is: x = 6 and y = 3

Or

(6,3)

7 0
3 years ago
Before radar and sonar, sailors would climb to the top of their ships to watch for land or changes in weather. If the lookout at
Rudiy27
D = 5/6 sqrt(h)
7 = 5/6 sqrt(h)
42/5 = sqrt(h)
h = (42/5)^2 = 1,764/25 = 70.56

The height of the mast is 70.56 miles
8 0
3 years ago
Read 2 more answers
What is the relationship between the 6 in the number 6.45 and the 6 in the number 62
Arada [10]

6 in the number 6.45 is the ones digit.

6 in the number 62 is the tens digit.

5 0
3 years ago
Shyla typed 2400 words in 60 min which graph can be used to find the rate at which shayla typed
marishachu [46]
2400 divided by 60 and you get your answer of 40 words per minute 

hope this helped! 

:)
4 0
3 years ago
Can know this asap test tomorrow ​
kodGreya [7K]

Tbh i only know problem 14.

The x-intercept is on the x-axis.  

In coordinate points (x,y).

The two x-intercepts are (-1,0) and (2,0).

To find the x intercept using the equation of the line, plug in 0 for the y variable and solve for x. You can also use the graph of the line to find the x intercept. Just look on the graph for the point where the line crosses the x-axis, which is the horizontal axis. That point is the x intercept.

8 0
4 years ago
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