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2 years ago

Hallar la ecuación de la recta que pasa por los puntos A(1,3) y B(3,7). Representarla gráficamente. Indicar su pendiente.

Mathematics

1 answer:

Fynjy0 [20]2 years ago

3 0

Answer:

Step-by-step explanation:

la recta:

$y-yo=m(x-xo)$ (*)

P=(xo,yo)

$m=\frac{Ya-Yb}{Xa-Xb}$

substituindo:

$m=\frac{3-7}{1-3}\\\\m=2$

Seja P=A=(xo=1,yo=3), utilizando a formula (*)

$y-3=2(x-1)\\y=2x-2+3\\y=2x+1$

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-5+ 3= 2) -7 -4 3) 122 × (-9) 4) -6 divided by 3/4

lutik1710 [3]

Answer:

Step-by-step explanation:

1) -5 +3 = -2

When two numbers are in different sign, subtract and the result will have the bigger numbers sign. The bigger number is 5. so the result is (-2)

2) -7 - 2 = -9

When two numbers have same sign, add and the result will have the common sign

3) 122 * (-9) = - 1098

4) -6 ÷ (3/4)

$=(-6)*\frac{4}{3}\\\\=-2*4$

= -8

4 0

3 years ago

Lee has $1.75 in dimes and nickels. The number of nickels is 11 more than the number of dimes. How many of each coin does he hav

Schach [20]

Answer:

Lee has 19 nickels and 8 dimes

Step-by-step explanation:

hello, I think I can help you with this

Step 1

Let

value of a nickel=$0.05

value of a dime=$0.10

number of nickels=N

number of nickels=D

According to the question data Lee has $1.75 in dimes and nickels.

0.05N+0.1D=1.75,equation(1)

also, the number of nickels is 11 more than the number of dimes.mathematical speaking

N=11+D,equation(2)

Step 2

replace N from equation (2) into equation (1)

0.05N+0.1D=1.75

0.05(11+D)+0.1D=1.75

Now, solve for D

0.55+0.05D+0.1D=1.75

0.15D=1.75-0.55

D=1.2/0.15

D=8

Step 3

replace the value of D into equation(2) to obtain N

N=11+8

N=19

Hence, Lee has 19 nickels and 8 dimes

Have a great day.

5 0

3 years ago

Is the word addition a collective, abstract or concrete noun?

Semenov [28]

Answer:

Should be a collective noun.

For example: In addition to those...

4 0

2 years ago

A line goes through the point (-8,9), and has a slope of 3/4

olya-2409 [2.1K]

Answer:

$y=\dfrac{3}{4}x+15$

Step-by-step explanation:

Given that,

A line goes through the point (-8,9), and has a slope of 3/4.

We need to express in the form of Ax+B for this line.

We have, m = 3/4

So,

$y=\dfrac{3}{4}x+B$

Put y = 9 and x = -8 in the above equation.

$9=\dfrac{3}{4}(-8)+B\\\\9=-6+B\\\\9+6=B\\\\B=15$

So,

$y=\dfrac{3}{4}x+15$

It is the required equation of the line.

6 0

3 years ago

What is the value of x in the equation x+7=−213 x+7=−2

MariettaO [177]

Answer:

Step-by-step explanation:

⅓x + 7 = -2

isolate the x term by subtracting 7 from both sides

⅓x = -9

Multiply both sides by 3

x = -27

6 0

2 years ago