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3 years ago

HELP PLZ

Mathematics

1 answer:

fiasKO [112]3 years ago

4 0

2.3a = 9.2

Divide 2.3 to both sides:

a = 4

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What is the slope between the points (-3, 7) and (-5, 4)

IrinaVladis [17]

Answer:

3/2

Sorry for the bad handwriting.

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3 years ago

5. Please write the equation of a line in y=mx+b format. Find the SLOPE first then find the Y-INTERCEPT (b) Your answer

castortr0y [4]

Answer:

y = $\frac{5}{3}x-1$

Step-by-step explanation:

Let the equation of the line is,

y = mx + b

Here m = slope of the line

b = y-intercept

Slope of a line passing through two points $(x_1,y_1)$ and $(x_2,y_2)$ is,

m = $\frac{y_2-y_1}{x_2-x_1}$

From the graph attached,

Since, the given line passes through (0, -1) and (3, 4),

Slope 'm' = $\frac{4+1}{3-0}$

m = $\frac{5}{3}$

y - intercept 'b' = -1

Therefore, equation of the line will be,

y = $\frac{5}{3}x-1$

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3 years ago

Which of the following statements uses the commutative property of addition?

Helen [10]

Answer:

Step-by-step explanation:

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3 years ago

A remote-control airplane descends at a rate of 2 feet per second. After 3 seconds it is 67 feet above the ground. Write the equ

Anastaziya [24]

A] A remote-control airplane descends at a rate of 2 feet per second. After 3 seconds it is 67 feet above the ground.
the point slope equation will be given as follows:
y-y1=m(x-x1)
where:
slope,m=2 ft/sec
(x1,y1)=(3,67)
thus plugging in the values in the formula, we obtain the point slope equation as follow:
y-67=2(x-3)

Answer:
y-67=2(x-3)

b]The height of the plane after 8 seconds will be:
x=8 sec
but:
y-67=2(x-3)
substituting x=8 we get:
y-67=2(8-3)
y-67=2(5)
y=10+67
y=77
thus the height after 8 seconds is 77 ft

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3 years ago

The standard formula for the volume of a cone is V=πr2h3. If the cone is scaled proportionally by a factor of k, its volume beco

DaniilM [7]

The volume of a cone with base radius r and height h is

$V = \frac 1 3 \pi r^2 h$

What happens when we scale by k ?

Let V' be the volume of a cone with radius rk and height hk

$V' = \frac 1 3 \pi (rk)^2 (hk) = \frac 1 3 \pi r^2 k^2 h k = k^3 (\frac 1 3 \pi r^2 h) = k^3 V$

8 0

3 years ago

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