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3 years ago

7

You estimate that a jar contains 68 marbles. The actual number of marbles is 60. Find the percent error. Round your answer to th

e nearest tenth. The percent error is about %.

1 answer:

ANEK [815]3 years ago

5 0

Answer:

27.2

Step-by-step explanation:

Hello!! I for got how to solve this but, I think it is:

68 x 0.60 = 40.8

68 - 40.8 = 27.2

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Find the area of a triangle whose base is 5cm and whose height is 12cm.

Neporo4naja [7]

By definition, the area of the triangle is given by:
$A = (1/2) * (b) * (h)
$
Where,
b: base
h: height
Substituting values we have:
$A = (1/2) * (5) * (12)

 A = 30 cm ^ 2$
Answer:
The area of a triangle whose base is 5cm and whose height is 12cm is:
A = 30 cm ^ 2

6 0

3 years ago

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Graph the line with the equation y=-1÷5×-3

Olenka [21]

Answer:

Step-by-step explanation:

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3 years ago

Find the point slope form and slope intercept form, indicate the slope and y-int:

Luda [366]

1) The point slope form and slope intercept form of 3x + 4y = -12 are $y+1=\frac{-3}{4}\left(x+\frac{8}{3}\right)$ and $y= \frac{-3}{4}x-3$ respectively

And slope is $\frac{-3}{4}$ and y -intercept is -3

2) The point slope form and slope intercept form of -2x - 3y = 6 are $y+1=-\frac{2}{3}\left(x+\frac{3}{2}\right)$ and $y=-\frac{2}{3} x-2$ respectively

And slope is $\frac{-2}{3}$ and y-intercept is -2

<u>Solution:</u>

Given, two equations are 3x + 4y = - 12 ⇒ (1) and – 2x – 3y = 6 ⇒ (2)

We have to find the point slope form and slope intercept form, and have to indicate the slope and y-intercept.

<em><u>The point slope form is given as:</u></em>

$y-y_{1}=m\left(x-x_{1}\right)$

Where "m" is the slope of the line

<em><u>The slope-intercept form is given as:</u></em>

y = mx + c

Where "c" is the y-intercept

<em><u>1) Solving 3x + 4y = -12</u></em>

Given equation is 3x + 4y = -12

On rearranging the terms, we get,

$\begin{array}{l}{4 y=-3 x-12} \\\\ {\rightarrow y=\frac{-3}{4}-3}\end{array}$

Hence the slope intercept form is $y=\frac{-3}{4}-3$

$\text { where slope is }-\frac{3}{4} \text { and } y-\text { intercept is }-3$

$\text { Point slope form i.e. } y-y_{1}=m\left(x-x_{1}\right)$

$\begin{array}{l}{3 x+4 y=-12} \\\\ {\rightarrow 4 y=-3 x-12} \\\\ {\rightarrow y=\frac{-3}{4} x-3} \\\\ {\rightarrow y=\frac{-3}{4} x-2-1} \\\\ {\rightarrow y+1=\frac{-3}{4}\left(x+\frac{8}{3}\right)}\end{array}$

<em><u>2) Solving -2x – 3y = 6 </u></em>

Slope intercept form is given as:

$-2 x-3 y=6 \rightarrow-3 y=2 x+6 \\\\\rightarrow y=-\frac{2}{3} x-2$

$\text { where slope is }-\frac{2}{3} \text { and } y-\text { intercept is }-2$

Point slope form is given as:

$\begin{array}{l}{-2 x-3 y=6 \rightarrow-3 y=2 x+6} \\\\ {\rightarrow y=-\frac{2}{3} x-2} \\\\ {\rightarrow y=-\frac{2}{3} x-1-1} \\\\ {\quad \rightarrow y+1=-\frac{2}{3}\left(x+\frac{3}{2}\right)}\end{array}$

Hence the required slope and y-intercept are found

4 0

2 years ago

I need help now!!!!

lozanna [386]

It is B i hope im right sorry if im wrong

5 0

2 years ago

Where is the answer to the expression 4 − 8 located on a horizontal number line? 4 units to the left of 4

Vilka [71]

4 - 8 = -4

A negative number is alwats at the left in a horizontal line.

Let's try to rapresent it.

-4 -3 -2 -1 0 +1 +2 +3 +4

So, you count from +4 to -4

Your answer is "8 units to the left of 4"

4 0

3 years ago