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2 years ago

I need to know if this Answer is correct. please tell me the answer. if it's wrong. Thanks!!!

Mathematics

2 answers:

yaroslaw [1]2 years ago

6 0

Here, as I can see, you are adding fractions, and making sure you have a common denominator.

12) is correct
13) is correct

You got a common denominator, and added them up! Great job!

Papessa [141]2 years ago

5 0

They are correct but I don't know whether or nor 13 asks you to simplify 23/20 to 1 3/20. But otherwise, it is all correct. Nice job.

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A circle's radius is increased by 10%. By what percentage does its area increase?

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Answer:

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Ajutați mă vă rog la asta La o sărbătoare , fiecare copil dintr-o grădiniță a primit o carte de 32 lei și o ciocolată de 8 lei.C

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Answer:

50 de copii

Step-by-step explanation:

În această întrebare, fiecare dintre copii primește o carte pentru 32 de lei și o ciocolată pentru 8 lei.

Ceea ce înseamnă că suma totală primită de fiecare dintre copii va fi de 32 + 8 = 40 lei

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2 years ago

The graph of the function P(x) = −0.34x2 + 12x + 62 is shown. The function models the profits, P, in thousands of dollars for a

STatiana [176]

Answer:

0 ≤ x < 1.12 and 34.18 < x ≤ 39.87

Step-by-step explanation:

The options of the question are

−4.57 ≤ x ≤ 39.87

1.12 ≤ x ≤ 34.18

−4.57 ≤ x ≤ 1.12 and 34.18 ≤ x ≤ 39.87

0 ≤ x < 1.12 and 34.18 < x ≤ 39.87

Let

x ----> is the number of tires produced, in thousands

C(x) ---> the production cost, in thousands of dollars

we have

$C(x)=-0.34x^{2} +12x+62$

This is a vertical parabola open downward (the leading coefficient is negative)

The vertex represent a maximum

The graph in the attached figure

we know that

Looking at the graph

For the interval [0,1.12) -----> $0\leq x$

The value of C(x) ----> $C(x) < 75$

That means ----> The production cost is under $75,000

For the interval (34.18,39.87] -----> $34.18 < x\leq 39.87$

The value of C(x) ----> $C(x) < 75$

That means ----> The production cost is under $75,000

Remember that the variable x (number of tires) cannot be a negative number

therefore

If the company wants to keep its production costs under $75,000 a reasonable domain for the constraint x is

0 ≤ x < 1.12 and 34.18 < x ≤ 39.87

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2 years ago

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Kisachek [45]

Let's make the mysterious, original price not-so-mysterious by calling it x. 245.97 is 3/5 of x.

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