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3 years ago

Please see the attachment below. Please explain.

Mathematics

1 answer:

schepotkina [342]3 years ago

7 0

Usually, you're asked to model a situation with an equation. Here, you're given the equation and asked what situation it models.

The features of the equation that are of interest are ...

multiplication of the unknown value by 17.35
comparison of that product to 624.60, expecting the product to be greater than that value

The first two offered scenarios involve addition of an unknown value, not multiplication.

The third offered scenario compares a purchase price to a budget amount. Answering a question like this involves a "less than" comparison, not a "greater than" comparison.

The last offered scenario involves finding a variable value that will result in the product 17.35x exceeding 624.60—exactly what the given inequality models.

The appropriate choice is ...

... J Daren earns $17.35 ...

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3. Mrs. Smith's class took a survey and found that 9 of 13 students prefer two scoops of ice cream versus one scoop of ice cream

Murljashka [212]

9/13=x/104
9•104=13x
936=13x
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3 years ago

Subtract (2x3 + 9x − 8) − (4x2 − 15x + 7).

STatiana [176]

2x^3 + 9x - 8 - (4x^2 - 15x + 7)....distribute thru the parenthesis
2x^3 + 9x - 8 - 4x^2 + 15x - 7....combine like terms
2x^3 - 4x^2 + 24x - 15 <==

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3 years ago

Read 2 more answers

I need to know how to answer number 10

Ipatiy [6.2K]

Check the picture below.

3 0

4 years ago

What is the product?

ZanzabumX [31]

Answer:

The product is:

$\left[\begin{array}{cc}15 & 14\\-1 & 9\end{array}\right]$

Step-by-step explanation:

For this problem you need to multiply the first row only for the two first column of the others matrix and get the desired result:

$\left[\begin{array}{ccc}1&3&1\\-2&1&0\end{array}\right] \times \left[\begin{array}{cc}2&-2\\3&5\\4&1\end{array}\right]$

$1 \times 2 + 3 \times 3 + 1 \times -2 = 15$

So the value of the element in the position $a_{11}$ is 15

$1 \times -2 + 3 \times 5 + 1 \times 1 = 14$

So the value of the element in the position $a_{12}$ is 14

Then with these two values you can determinate the result matrix.

$\left[\begin{array}{cc}15 & 14\\-1 & 9\end{array}\right]$

3 0

3 years ago

How much 20% solution needs to be added to a 60% solution to make 400 ml of a 40% solution

Scorpion4ik [409]

Let $x$ be the volume of 20% solution, $y$ the volume of the 60% solution. We want a total volume of 400 mL in the final mixture, so

$x+y=400$

Each mL of either solution will contribute a corresponding concentration, and in the final mixture we want the 400 mL to have a 40% concentration, which means we should also have

$0.2x+0.6y=0.4\times400=160$

Solve the system and we get $x=y=200\,\rm{mL}$ .

4 0

3 years ago