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Mrac [35]
3 years ago
10

Simplify c + 6 < -20

Mathematics
1 answer:
Stels [109]3 years ago
7 0

Answer:

Step-by-step explanation:

c + 6 < -20

Subtract 6 from both side

c +6 -6 < -20-6

c < -26

So value of c should be less than -26. Value of c = { - ∞ ...... -28, - 27 }

Eg:

If c = -27

-27 + 6 = - 21 . -21 is less than -20

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Jose needs to memorize words on a vocabulary list for French class. He has memorized 20 of the words, which is four-fifths of th
Stella [2.4K]

Answer:

25

Explanation:

In order to solve this the easiest way you can use equivalent fractions.

\frac{4}{5} = \frac{20}{?}\\

Since 4 times 5 equals 20 we can multiply 5 times 5 to get our answer.

\frac{4}{5} * \frac{5}{5} = \frac{20}{25}

25 is the answer. But, if we couldn't have gotten to 20 through the multiplication we could use a proportion. That would look like the initial problem but instead of a "?" we would use a variable. I will use <em>t</em> for total.

\frac{4}{5} = \frac{20}{t}\\

So now we have our problem set up. The next step is to cross multiply. 4 by <em>t</em> and 5 by 20.

4t = 5 * 20\\4t = 100\\

And now we can solve it like a normal algebra problem.

\frac{4}{4}t = \frac{100}{4}\\t = 25

Either way, we get 25.

5 0
3 years ago
Daniel is completing a home project. He needs 13 pieces of wood to complete the project, each is 1/2 foot long. How much wood do
Tresset [83]

Answer:

Step-by-step explanation:

Hey there!

In order to solve this problem, you need to know this:

13 pieces of wood, and 1 piece of wood=0.5 ft

Your equation would be 0.5*x=13

13/0.5=x

x=26

Your answer is 26 feet long!

Good luck! :)

5 0
3 years ago
How many solutions exist for the system of equations 3x+y=18 3x+y=16
Vera_Pavlovna [14]

Answer:

no solutions

Step-by-step explanation:

Subtract the two equations

3x+y=18

-(3x+y=16)

--------------------

0 + 0 = -2

0 does not equal negative 2

This is never true so there are no solutions

5 0
3 years ago
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saveliy_v [14]

Answer:

The key features of a quadratic function are the y-intercept, the axis of symmetry, and the coordinates and nature of the turning point, or vertex.

(This information is from the internet)

Step-by-step explanation:

Standard, intercept, and vertex are the three forms quadratic functions can be named.

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3 years ago
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Answer:

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5 0
3 years ago
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