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Blababa [14]
3 years ago
10

At an Italian bistro, the cost of 2 plates of spaghetti and 1 salad is $27.50. The cost for 4 plates of spaghetti and 3 salads i

s $59.50. Write and solve a system of equations to find the cost of 1 plate of spaghetti and 1 salad.
Mathematics
1 answer:
arsen [322]3 years ago
8 0
2a+1b=27.50
4a+2b=59.50
Multiply first equation by -4 and the second by 2 so you can drop off the a values then add the equations together.  Then solve for b.  You should get b=6.

Then plug b into one of the original equations and solve for a and you should get 10.75

So a plate of spaghetti is $10.75 and a salad is $6.
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Which system of equation is represented​
olga nikolaevna [1]

Answer:

D

Step-by-step explanation:

First, let us figure out what is graphed and then manipulate each answer to try to match it.

The one with a positive slope is

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The one with the negative slope is

y\geq 3-2x

Now that we have our graphed system of inequalities, we can try to match them to an answer.

A. while the x-2 is the same, the other does not have an x, so it cannot match.

B. The second inequality has the wrong sign, so it is impossible for this to be our answer.

C. When each of these are solved for y, you get y\leq 2x-3\\\\y\leq 2-x. Neither of these match so this cannot be correct.

D. When the first inequality is solved you get y\geq 3-2x

When the second inequality is solved you get y\leq x-2

As both of these answers match our graphed inequalities, D is the correct answer.

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3 years ago
Leon has 3/8 the number of tropical fish that haru has how many times the number of tropical fish Leon has is the number of trop
stealth61 [152]
Let
Haru's number ---> x 
<span>Leon's number ---> (3/8)x 
</span>so
ratio of 
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5 0
3 years ago
Read 2 more answers
Area of a circle with a radius of 6.75 inches
maw [93]

Answer:

A = 143.2

Step-by-step explanation:

A= πr² = π(6.75)² = \frac{22}{7} × 45.5625 = 143.196 ≈143.2

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2 years ago
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