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Rom4ik [11]
2 years ago
8

GIVING BRAINLIEST!!!!!!

Mathematics
2 answers:
aivan3 [116]2 years ago
7 0
Y=2x+3,when x is equal to 0,y is equal to 3, which means intercept is equal to 3
anzhelika [568]2 years ago
4 0

Answer:

y=2x+3

Step-by-step explanation:

Choose 2 ordered pairs from the table:  (0, 3) and (5, 13)

Let (x_1,y_1) = (0, 3)

Let (x_2,y_2) = (5, 13)

Use the slope formula to find slope: m=\dfrac{y_2-y_1}{x_2-x_1}

\implies m=\dfrac{13-3}{5-0}=2

Use point-slope form of linear equation to find equation:

\implies y-y_1=m(x-x_1)

\implies y-3=2(x-0)

\implies y=2x+3

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Rajan needs 1 liter of 15% hydrochloric acid solution for an experiment. He checks his storage cabinet, but he only has a 5-lite
yarga [219]

Answer:

<em>Rajan must use </em><em>0.75</em><em> liters of 5% hydrochloric acid solution and </em><em>0.25</em><em> liters of 45% hydrochloric acid solution.</em>

Step-by-step explanation:

Let us assume that, x liters of the 5% hydrochloric acid and y liters of the 45% hydrochloric acid solutions are combined.

As Rajan need total of 1 liter of solution, so

x+y=1

i.e x=1-y --------------------1

As Rajan needs 5% hydrochloric acid and 45% hydrochloric acid to make a 1 liter batch of 15% hydrochloric acid, hence acid content of the mixture of two acids will be same as of the final one, so

0.05x+0.45y=1\times 0.15

i.e 5x+45y=15 -------------2

Putting value of x from equation 1 in equation 2,

\Rightarrow 5(1-y)+45y=15

\Rightarrow 5-5y+45y=15

\Rightarrow 5+40y=15

\Rightarrow 40y=15-5=10

\Rightarrow y=0.25

Putting the value of y in equation 1,

x=1-0.25=0.75

Therefore, Rajan must use 0.75 liters of 5% hydrochloric acid solution and 0.25 liters of 45% hydrochloric acid solution.

5 0
4 years ago
Kiran says that a solution to the equation x+4=20 must also be a solution to the equation 5(x+4)=100 Write a convincing explanat
Helen [10]

Answer:

x+4=20 is a solution to 5(x+4)=100.

Step-by-step explanation:

Following PEMDAS, divide 5 from both sides of the equation 5(x+4)=100, and you have x+4=20 remaining.

This means that both equations have the same solution.

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3 years ago
What Is the value of 3^3 +7(2x-6) when x=4
Airida [17]

Answer:

18? i don't think it's right but i tried mental math

Step-by-step explanation:

PEMDAS

5 0
3 years ago
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