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3 years ago

A segment is on a number line with endpoints at 2.8 and 4.6. What is the length of the segment?

Mathematics

1 answer:

Gala2k [10]3 years ago

3 0

Answer: 1.8

Step-by-step explanation:

2.8 --------------------4.6

"1.8"

4.8 - 2.8 = 1.8

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Write an equation in slope-intercept form for the line that passes through (1,9) and (3,5).

kozerog [31]

Answer:

The answer to your question is y = -2x + 11

Step-by-step explanation:

A (1, 9)

B (3, 5)

- Find the slope

$m = \frac{y2 - y1}{x2 - x1}$

$m = \frac{5 - 9}{3 - 1}$

$m = \frac{-4}{2}$

m = - 2

- Find the line equation

y - y1 = m (x - x1)

y - 5 = -2(x - 3)

y - 5 = -2x + 6

y = -2x + 6 + 5

y = -2x + 11

8 0

3 years ago

Read 2 more answers

Ju-yi just got back from A 10 mile bicycle ride and she had ridden three miles per hour faster. The ride would have taken her 30

Gnom [1K]

Answer:

$6.39\ miles/hr$

Step-by-step explanation:

$Let\ her\ speed=x\ mile/hr\\\\Let\ time\ taken=t\ hr\\\\distance=speed\times time\\\\10=x\times t\ .........................(1)$

When speed is 3 mi/hr faster.

$Her\ speed=x+3\ mile/hr\\\\Time\ taken=t-\frac{1}{2}\ hr\ \ \ as\ it\ takes 30\ minutes\ fewer\ and\ 30\ min=\frac{1}{2}\ hr\\\\distance=speed\times time\\\\10=(x+3)\times (t-\frac{1}{2})\\\\10=xt+3t-\frac{x}{2}-\frac{3}{2}\......................eq(2)\\\\eq(2)-eq(1)\\\\10-10=xt+3t-\frac{x}{2}-\frac{3}{2}-xt\\\\3t=\frac{x}{2}+\frac{3}{2}\\\\t=\frac{x+3}{6}\\\\from\ equation\ 1\ t=\frac{10}{x}\\\\\frac{10}{x}=\frac{x+3}{6}\\\\60=x^2+3x\ \ \ \ \ \ \ \ \ cross\ multiplication\\\\x^2+3x-60=0$

$Solution\ of\ ax^2+bx+c=0\ is\ given\ by\ x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}\\\\Here\ a=1,b=3\ and c=-60\\\\x=\frac{-3\pm\sqrt{3^2-4\times 1\times (-60)}}{2}\\\\x=\frac{-3\pm\sqrt{9+240}}{2}\\\\Only\ positive\ value\ will\ be\ taken\\\\x=\frac{-3+\sqrt{9+240}}{2}=6.39\ miles/hr$

7 0

3 years ago

Using F(x) = 5x^2- 3, what is f(-3)? A. 42 B. -3 C.-48 D. -42

Gnom [1K]

Answer: 42

Step-by-step explanation

Switch x out with 3

using Pemdas do the exponent first

3^2 is 9

then multiply

5*9= 45

then subtract

45-3=42

8 0

3 years ago

2x – Зу = -5 3х + 5y= 1

Bess [88]

Answer:

what are we trying to do with the problem tho?

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers

Your school district cancels schools when more than 2.5 inches of snow accumulate on the ground each hour. Snow is currently acc

kari74 [83]

Answer:

Extra snow needed > 0. 3 inch

Step-by-step explanation:

Given that:

Cancelation occurs when > 2.5 inch of snow accumulates each hour

Accumulation rate = 11/5 inch per hour

Extra snow Accumulation needed to cancel. School ;

Extra snow needed > cancelation volume - current rate

Extra snow needed > (2.5 - 11/5)

Extra snow needed > 0. 3 inch

5 0

3 years ago