Ask question

Ask question

All categories

2 years ago

10

Please help quick what is the answer thank you

2 answers:

Gennadij [26K]2 years ago

8 0

Answer:

y= -3x+4

Step-by-step explanation:

y=mx+c

m= y2-y1 ÷ x2-x1

m= -3

y=-3x+c

7=-3(-1)+c

c=4

y=-3+4

notka56 [123]2 years ago

5 0

Answer: y= -3x + 4
Explanation: As the general equation of line is y= mx + c where m is the slope of the line and c is the y intercept.
=> for m we need to find the slope of line which is y2 - y1/ x2 - x1
=> 7-1/ -1-1 = 6/-2 = -3
and as we can in the diagram the y intercept is 4
that means our equation for the given line is y = -3x + 4.

You might be interested in

The cost C (in dollars) of making n feet of cabinet is represented by C = 18n + 45.

likoan [24]

The amount of board is 5.5 feet because 18*5.5=99 and 144-45 is 99.

5 0

3 years ago

What is the volume of the pyrmid?

skad [1K]

Answer:

The volume of pyramid is 480cm³

Step-by-step explanation:

$\frac{1}{3} \times l \times w \times h$

l = 15cm

w = 6cm

h = 16cm

volume = (1/3)×15×6×16

= 480cm³

3 0

3 years ago

Read 2 more answers

kogti [31]

Answer:

$5

Step-by-step explanation:

8 0

3 years ago

A golfer hits a golf ball.

11111nata11111 [884]

Answer:

The golf ball was in the air for 4 seconds.

Step-by-step explanation:

Solving a quadratic equation:

Given a second order polynomial expressed by the following equation:

$ax^{2} + bx + c, a\neq0$ .

This polynomial has roots $x_{1}, x_{2}$ such that $ax^{2} + bx + c = a(x - x_{1})*(x - x_{2})$ , given by the following formulas:

$x_{1} = \frac{-b + \sqrt{\Delta}}{2*a}$

$x_{2} = \frac{-b - \sqrt{\Delta}}{2*a}$

$\Delta = b^{2} - 4ac$

In this question:

We have to find the amount of time it takes for the ball to hit the ground. We have that:

$d(t) = -2t^2 + 7t + 4$

Which is a quadratic equation with $a = -2, b = 7, c = 4$ .

How long is the golf ball in the air?

We have to find t for which $d(t) = 0$

So

$-2t^2 + 7t + 4 = 0$

$\Delta = b^{2} - 4ac = (7)^2 - 4(-2)(4) = 81$

$t_{1} = \frac{-7 + \sqrt{81}}{2*(-2)} = -0.5$

$t_{2} = \frac{-7 - \sqrt{81}}{2*(-2)} = 4$

Time is a positive measure, so t = 4.

The golf ball was in the air for 4 seconds.

6 0

3 years ago

Anna's city has more rainfall in January than July.

dolphi86 [110]

Answer:

Answer: 40.5 inches

Step-by-step explanation:

im pretty sure thats it for you:)

8 0

3 years ago