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Stolb23 [73]
3 years ago
7

Here is a linear equation, y = 1x +

Mathematics
2 answers:
Gnom [1K]3 years ago
8 0

Answer:

  • Just test the points in the equation
  • Point 1: (1,1.5)
  • y=x+5\\(1.5)=(1)+5\\1.5=6 ?? Is that true? No, so this point is not a solution
  • Point 2: (12,4)
  • y=x+5\\(4)=12+5\\4=17 ?? Not true, its not a solution.
  • so neither is a solution because the equation is not satisfied
saul85 [17]3 years ago
4 0

Answer:

Step-by-step explanation:

plug in both values and see if the equations are true

1.5 = 1(1) + 5

1.5 = 1 + 5

1.5 does not equal 6

so (1,1.5) is not a solution

4 = 1(12) + 5

4 = 12 + 5

4 does not equal 17

so (12,4) is not a solution

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Jason mixed 8 ml of a salt solution with 11ml of a 47% salt solution,to make a 43% salt solution. Find the percent salt concentr
pantera1 [17]

Let x% be the salt concentration of first solution.

Then in 8ml, amount of salt =  \frac{8x}{100}

Given that to this 8ml solution, 11ml solution of a 47% salt solution is mixed.

amount of salt in 11ml of 47% salt solution is  =  \frac{11*47}{100} = \frac{517}{100}

So, total amount of salt in new mixture =  \frac{8x}{100} +\frac{517}{100} =\frac{8x+517}{100}

But given that this new solution is a 43% salt solution.

Hence amount of salt in new mixture of (8+11)=19ml solution of 43% salt solution is \frac{19*43}{100} = \frac{817}{100}

Hence  \frac{8x+517}{100} = \frac{817}{100}

            8x+517 = 817

             8x=817-517 = 300

             x= 300/8 = 37.5

Hence the salt concentration in the first solution is 37.5%

8 0
3 years ago
(b) Jac thinks of a number,<br> 25% of his number is 35.<br> What is 1/10 of Jac's number?
MaRussiya [10]

Answer:

14

Step-by-step explanation:

35 = 25%

35(4) = 100%

140 = 100%

140 x .10 = 10%

14 = 10%

8 0
3 years ago
Sam and Bobby want to know who cycled faster. The table shows the total miles Sam traveled over time. The graph shows the same r
tigry1 [53]

Answer:

<h2>Sam cycled fast, at a rate of 10 miles per hour.</h2>

Step-by-step explanation:

To solve this problem we have to find the slope of each case. The definition of a slope is:

m=\frac{y_{2}-y_{1}}{x_{2}-x_{1}}\\

Where (x_{1};y_{1}) is the first point, and (x_{2};y_{2}) is the second point.

Let's find each slope.

<h3>Sam.</h3>

Let's use the points (2;20) and (5;50)

Applying the definition of the slope, we have:

m_{sam} =\frac{50-20}{5-2}=\frac{30 \ miles}{3 \ hour}=10 \ miles/hour

This relation means that Sam cycled 10 miles per hour.

<h3>Bobby.</h3>

Let's use the points (2;18) and (6;54)

m=\frac{54-18}{6-2}=\frac{36 \ miles}{4 \ hour}=9 \ miles/hour

Bobby cycled 9 miles per hour.

Therefore, according to these ratios, Sam cycled fast, at a rate of 10 miles per hour.

7 0
3 years ago
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SIZIF [17.4K]

Eat the Legendry Fruit: And play King legcy

Step-by-step explanation:

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3 years ago
If you can help please do it’s urgent
Marta_Voda [28]
-216 is the right answer!
4 0
3 years ago
Read 2 more answers
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