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4 years ago

I don’t know how to answer this

Mathematics

1 answer:

masya89 [10]4 years ago

4 0

Answer:

20 ≥ 9 + (8 -7)·6
20 ≥ 1 + (2 -3)·4
20 ≥ 8 +(3 -5)·4

Step-by-step explanation:

You mainly need to make sure that the product has a value less than 20. That's not hard to do, since the difference can't be more than 9, and can be negative.

Pick some digits to put into the expression and see what the value is. Then make any adjustments you might need to make to reduce the sum. If you put 0 in the rightmost box, the other digits can be anything. (They just have to be different.)

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Five times the difference of twice a number and nine is negative five. Find the number.

Ilya [14]

Answer:

x = 4

Step-by-step explanation:

Step 1: Write out the expression

5(2x - 9) = -5

Step 2: Solve for <em>x</em>

10x - 45 = -5

10x = 40

x = 4

4 0

3 years ago

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8)What is the equation of a line that goes through the point (3, 12) and is perpendicular to the line given by the equation y =

grigory [225]

The slope of the first line is $m_1=\frac{-1}{3}$ .
To be perpendicular the slope of the second line must be the negative reciprocal of the first: $m_2=3$
Use the slope-intercept formula:
$y=mx+b$
Substitute known values:
$12=3(3)+b$
Solve for $b$ :
$b=3$
Complete the formula:
$y=3x+3$

4 0

4 years ago

Write an equation for each line (use the picture)

loris [4]

Answer:

Red Line: y=4

Blue Line: y=-2

Green Line: x=-1

Yellow Line: x=6

Step-by-step explanation:

Red line: the line crosses through 4 on the y axis. Therefore, y=4.

Blue line: the line crosses through -2 on the y axis. Therefore, y=-2.

Green line: the line crosses through -1 on the x axis. Therefore, x=-1.

Yellow line: the line crosses through 6 on the x axis. Therefore, x=6.

This is a bit confusing because when you see a horizontal line your mind might assume it would be an x=. Yet, it is the opposite. Hope this helps!

4 0

3 years ago

Read 2 more answers

For what interval is the function f(x) = (20 + \sqrt{x}) / (\sqrt{20 + x}) continuous?

konstantin123 [22]

Try this solution:
1. according to the condition
$\left \{ {{x \geq 0} \atop {20+x\ \textgreater \ 0}} \right. \ =\ \textgreater \ \ x \geq 0.$
2. for more details see the attached graph.

Answer: [0;+oo)

5 0

3 years ago

<img src="https://tex.z-dn.net/?f=%5Csqrt%7B25%7D" id="TexFormula1" title="\sqrt{25}" alt="\sqrt{25}" align="absmiddle" class="l

Kisachek [45]

Answer:

the square root of 25 is 5

Step-by-step explanation:

5 x 5 = 25, thus, 5 is your answer

7 0

3 years ago

Read 2 more answers