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faltersainse [42]
3 years ago
7

Solve fot z show all your work. 7z - 18 =2z+ 18​

Mathematics
1 answer:
Veseljchak [2.6K]3 years ago
3 0

Answer:

z = 36/5​

Step-by-step explanation:

7z - 18 =2z+ 18​

Subtract 2z from each side

7z-2z- 18 =2z-2z+ 18

5z - 18 = 18

Add 18 to each side

5z-18+18 = 18+18

5z = 36

Divide by 5

5z/5 = 36/5

z = 36/5​

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Which of the following shows the graph of the eniquality y&gt;x+3<br><br> PLEASE include image
7nadin3 [17]

in plain and short, to graph an inequality, we first graph its EQUALITY graph, and then we do the shading.

so to graph y > x + 3, we first graph y = x + 3, which is just a line, and then do a true/false check on a point to see which side we shade.

let's hmmm  check the point say (0,2), x = 0, y = 2.

y > x + 3

2 > 0 + 3

2 > 3  <--- is that true?  is 2 really larger than 3?  nope, so is false.

that simply means that the point (0, 2)  is on the false area, so that's the area we do NOT shade, so <u>we shade the other side</u>.

y > x + 3, means "y" is greater than or larger than that line, but not equals, larger not equal, meaning the values on the borderline are not included, so the line is a dashed line.


check the picture below.

5 0
3 years ago
What do i do?? i just have to find what the the question marks show.
lina2011 [118]
------------------------------------------------------
Given information
------------------------------------------------------
100%  = $27.60

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Rewriting it
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\$27.60 = 100 \%
\$1 = 100 \div 27.60 \%
\$1 =  \frac{250}{69} \%

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Find $4.14 in percentage
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\$1 = \frac{250}{69} \%
\$4.14 =  \frac{250}{69}  \times 4.14
\$4.14 = 15%

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Answer: 15%
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Find $31.74 in percentage
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\$1 = \frac{250}{69} \%
\$31.74 = \frac{250}{69} \times 31.74
$31.74 = 115%

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Answer: 115%
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4 0
3 years ago
What is the slope of the line shown?? Please help i been stuck on this all day yesterday and now today..
Talja [164]
I hope this helps.if you have any questions regarding what I did you can ask

4 0
3 years ago
A medicine is known to decompose and become ineffective if its temperature ever reaches 103 degrees Fahrenheit or more. Write an
Ludmilka [50]

Answer: Interval = [103,∞)

Explanation :

A medicine become ineffective if its temperature ever reaches 103 degrees Fahrenheit or more .

So, Interval becomes [103,∞)

i.e. semi-open or semi-closed interval as it includes 103\textdegree

So, we used closed brackets i.e. square brackets and

For '∞' we always use open brackets only.

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(c) Given that the average speed for the entire journey was 80 km/h, form an equation in x and solve the equation.​
Oduvanchick [21]

Answer:

80x = y

Step-by-step explanation:

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