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stepladder [879]
4 years ago
10

Use a bar model to find the unknown value: 3/6 = ?/7

Mathematics
1 answer:
Lelechka [254]4 years ago
8 0
This is set up as a proportion, so let’s cross multiply the values. When you do, you should get 21 = 6x. Now, divide each side by 6 to isolate the “x”. 21/6 is 3.5. x = 3.5. The unknown value is 3.5.
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Use a separate sheet of paper to solve the system of inequalities by graphing. Use the graph to decide if the point (1, –1) is i
Lena [83]

Answer:

The answer is no though, the point (1,-1) is below both.

Step-by-step explanation:

So the two inequalities are y≤-3x+3 and 3x+8y≥3

With inequalities you have to know a few things.  First, when you graph you may have to use non solid lines.  for instance, if you had x<5, 5 would not be part of the answer because it is only answers less than 5.  so you represent this by making a dashed line that says "you cannot include values on this line".  Second, with algebra, if you multiply both sides by a negative it flips the inequality.  for instance -y > 54 you would multiply (or divide) by -1 and it would change to y < -54.  Third, when graphing an inequality, treat it like an equation and graph the line as if it were said equation(with solid or dashed lines as needed)  then, if it is y > f(x) you shade in the section above the line and y < f(x) shades in below.  The shaded part is your answer basically.  Now lets get into yours.

y≤-3x+3

It is already in the form y = f(x)  so grapht he line 3x + 3 with a solid line since it is y is less than or equal to,  then shade below that line.  

3x+8y≥3

First get it so y is by itself

3x+8y≥3

8y≥3 - 3x

y ≥ 3/8 - 3/8 x

Now grapht his line  with a solid line and shade the area above it.

Now, the shaded area below between y ≥ 3/8 - 3/8 x and  y≤-3x+3 and the lines are your answer, so you need to check if the point (1, -1) is in this shared shaded area or on one of the lines.

The answer is no though, the point (1,-1) is below both.

6 0
4 years ago
How can you use a rate to compare costs of two boxes of cereal that are different sizes
MatroZZZ [7]
A rate shows how much larger or smaller one box is to the other box.
6 0
3 years ago
Please help me!!! <br> I forgot how to do this
lara [203]

Answer:

3.25 cups

Step-by-step explanation:

i think. have a good day!

lol i got it wrong. sry.

6 0
3 years ago
Read 2 more answers
How do you Solve 2v−6v+7v=15.
jenyasd209 [6]
2v-6v=-4v
-4v+7v=3v
3v=15
15 divided by 3 is 5
5 0
3 years ago
How do you change 3/8 to an equivalent fraction with a denominator of 100
lakkis [162]

I won't give you the answer straight up but I will give you the definition of what you need to do.. To change a fraction into an equivalent fraction with a denominator of 100: 1. establish how many times the given denominator fits (divides) into 100 2. multiply both the numerator and the denominator by that number.

3 0
3 years ago
Read 2 more answers
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