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3 years ago

I need help in this zzzzzzz

Mathematics

1 answer:

konstantin123 [22]3 years ago

3 0

Answer:

$7$

Solution:

This is a <em>linear function. </em>This means means that r is our rate of change.

To find r recal following formula

$r=\frac{\Delta y}{\Delta x} = \frac{y_2-y_1}{x_2-x_1}$

Since this is a linear function we can choose any two points. I will choose the first two for simplicity

$\Displaystyle \therefore r = \frac{42-14}{6-2}=\frac{28}{4}=7$

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Solve 58 - 10x<20+9x

irina1246 [14]

Answer:

x>2

Step-by-step explanation:

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3 years ago

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Solve for x.

Ivanshal [37]

Answer:

x = -3.25

Step-by-step explanation:

2/5 = 0.4

0.4x - 0.2 = -2(3/4)

-2(3/4) = -2/1 * 3/4 = -6/4

0.4x - 0.2 = -6/4

Convert to fraction

2/5x - 1/5 = -6/4

Add 1/5 to both sides

-6/4 + 1/5 = -30/20 + 4/20 = -26/20

2/5x = -26/20

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2 years ago

To join a Yoga club there is a $100 annual fee and a $5 fee for each class you attend.

Leona [35]

Answer:

210

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3 years ago

Use the midpoint formula to estimate the sales of Cars, Inc. in 2009, given the sales in 2008 and 2010. Assume that the sales of

lana [24]

Answer:

<em>The estimated sales were $260 million</em>

Step-by-step explanation:

Assume the endpoints of a segment are (x1,y1) and (x2,y2).

The midpoint (xm,ym) is calculated as follows:

$\displaystyle x_m=\frac{x_1+x_2}{2}$

$\displaystyle y_m=\frac{y_1+y_2}{2}$

The sales ov Cars, Inc. were (2008,240 million) and (2010,280 million). We need to use the midpoint to estimate the sales in 2009:

$\displaystyle x_m=\frac{2008+2010}{2}=2009$

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The estimated sales were $260 million

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3 years ago

-3(5)^2-(-2)(-8) simplify

avanturin [10]

To do this, we're going to use the order of operations (PEMDAS):

P - Parentheses

E - Exponents

M - Multiplication

D - Division

A - Addition

S - Subtraction

First let's do parentheses, there isn't anythig in parentheses we need to simplify, so we can skip this step.

Next let's look for exponents. I see we have a $5^2$ so let's replace that with $5^2=25$ :

$-3(25)-(-2)(-8)$

Now let's look for multiplcation. We know that things that are right next to eachother in parentheses represent multiplcation, so let's simply this more:

$-3(25)=-75$

$(-2)(-8)=16$

$-75-16$

And now we're left with a simple problem we know how to solve.

Answer: $-91$

Hope this helps!

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3 years ago