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Nostrana [21]
3 years ago
10

My question is, with this type of question, are you supposed to use subtraction instead of addition? Just asking because I had a

problem where it said 5(x+7) and my answer was 5x+35 *your writing equivalent expressions* and it used addition, which is why I added the sums of 5•x plus 5•7 which was 5x and 35. But I just wanna know if I use addition or subtraction for this problem, 3y(4-2y)

Mathematics
2 answers:
julia-pushkina [17]3 years ago
6 0

The answer to the one on the paper is -6y • (y - 2)

sergeinik [125]3 years ago
5 0

Im pretty sure you use addition? I may be wrong

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The length of a rectangle is 15 and its width is w.
Fed [463]

A rectangle with sides 15 and w has perimeter

2p = 2(15+w) = 2w+30

We want this quantity to be at most 50, so it must be less than or equal to 50:

2w+30\leq 50

For the record, this implies that

2w\leq 20 \iff w \leq 10

So, the width can be at most 10.

6 0
3 years ago
Read 2 more answers
Please tell me the area and attach work the most important part is work since I’m confused on subtracting the side lengths
Ymorist [56]

Answer:

The area is 288 feet

Step-by-step explanation:

So the best way to solve problems like this is to think about the parts of the object like different things, and iscolating them.

We see that the length of the rectangle is 21, and the width is 13.

Ignore the 5 and 16, since they tell you what you neeed to know about the other smaller rectangle.

So lets just use the formula for area of a rectnagle, which is l*w, using the 21 and 13 values above:

21*13= 273

Now lets look at the second part.

I think this is the part you were confused with, so I will go into detail on how we find the area of this part of the rectangle

We see that there is a 16...However, we already know that the width is 13. So how is this? The 16 includes both the width of the rectangle and of the smaller piece.

Since we already know that the width of the rectangle is 13, but the small segment makes it 16, we can subtract the total wifth by the width of the rectangle, which will find us the width of the segment:

16-13=3

So the width is 3.

This is not what we do with the 21 and 5. When we look at the segment, we see that the 5 covers all of it, and does not cover any of the rectangle's length. This basicallly means that the 5 length is only for the segment, so this is considered our length.

Now we can use this to figure out the segments area:

3*5=15

Now, since we need to find the combined area of the both the segment and the rectangle, we need to add them together:

273+15=288

So the area is 288 in total.

Hope this helps!

7 0
3 years ago
Simplify<br> 50(x^2+7x+6)
worty [1.4K]

Distribute 50 to every term inside the parentheses.

50\cdotx^2+50\cdot7x+50\cdot6

Simplify with multiplication.

\huge\boxed{50^2+350x+300}

You can't simplify further by adding, so leave the answer as-is.

4 0
2 years ago
Read 2 more answers
Write the equation of the lines resented below in slope-intercept form
scoray [572]

Slope intercept form: y = mx + b

mx = slope

b = y-intercept

We know the y intercept is 0, so nothing will be written there.

To find the slope of this line, we can use the slope formula.

\frac{y.2 - y.1}{x.2 - x.1} = m

We'll use the points (1, 0) and (3, 1) to find the slope.

Now we can just plug these values into the equation to find the slope.

1 - 0 / 3 - 1

1 / 2

The slope of the line is 1/2, or 0.5.

The slope-intercept form of this line can be written as:

y = 0.5x

6 0
3 years ago
F(x) = x2 - 4x - 21.
mote1985 [20]

Answer:

y-intercept = (0,-21)

vertex = (2,-25)

Step-by-step explanation:

8 0
3 years ago
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