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3 years ago

10

Yolanda is buying supplies for school. She buys n packages of pencils at 1.40 per package and m pads of paper at 1.20 each. What

does the term in the expression 1.4n + 1.2m represent? What does the entire expression represent?

1 answer:

Elanso [62]3 years ago

4 0

The entire expression represents how many packages of pencils and pads of paper bought.

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GenaCL600 [577]

A) 8 - add up the how many numbers there are after the 4 on the left column

b) 41 - line up all of the numbers from least to greatest and find the middle number

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3 years ago

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Solve the formula <br> x − y = −8 for y.

laiz [17]

Answer:

$y = x + 8$

Step-by-step explanation:

$x - y = - 8$

$x + 8 = y$

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3 years ago

ASAP WILL GIVE BRAINLIEST!!! DO NOT USE PICTURES PLEASE Part A: Solve the equation 7x + 3x − 18 = 6(x + 3), and show your work.

Brrunno [24]

The answer is x=9 because (look at the picture)

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3 years ago

If x is a positive integer and y is a negative integer than x + y is a rational number.

romanna [79]

Answer:

Yes

Step-by-step explanation:

An integer is a whole number so if x is positive and y is negative then the equation would just be x plus negative y. But x+-y is an odd equation so the simplified version is x-y so it is a rational number, since a rational number is a number that can be rewritten as a simple fraction.

5 0

3 years ago

Determine whether f(x) = –5x^2 – 10x + 6 has a maximum or a minimum value.

Blizzard [7]

First,

We are dealing with parabola since the equation has a form of,

$y=ax^2+bx+c$

Here the vertex of an up - down facing parabola has a form of,

$x_v=-\dfrac{b}{2a}$

The parameters we have are,

$a=-5,b=-10, c=6$

Plug them in vertex formula,

$x_v=-\dfrac{-10}{2(-5)}=-1$

Plug in the $x_v$ into the equation,

$y_v=-5(-1)^2-10(-1)+6=11$

We now got a point parabola vertex with coordinates,

$(x_v, y_v)\Longrightarrow(-1,11)$

From here we emerge two rules:

If $a$ then vertex is max value
If $a>0$ then vertex is min value

So our vertex is minimum value since,

$a=-5\Longleftrightarrow a$

Hope this helps.

r3t40

7 0

3 years ago