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3 years ago

A student made an 85% on a test with 25 questions. What is the number

Mathematics

1 answer:

olya-2409 [2.1K]3 years ago

4 0

The student answered 21 questions correctly to earn an 85

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1/3 (2x-5) =3 how do I solve this equation

jeyben [28]

$\frac{1}{3} (\frac{3}{1}) (2x-5) = 3 (\frac{3}{1})$

$2x-5=9$

$2x=14$

$\frac{2x}{2}= \frac{14}{2}$

$x=7$

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4 years ago

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An oblique cylinder has a radius of 10 units and slant length of 26 units. What is the volume of the cylinder?

Alexxandr [17]

(a/1) 2400 pi cubed is correct

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4 years ago

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Find each x-value at which f is discontinuous and for each x-value, determine whether f is continuous from the right, or from th

fredd [130]

Using continuity concepts, the answers are given by:

The function is right-continuous at x = 0.

The function is left-continuous at x = 1.

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

A function f(x) is continuous at x = a if:

$\lim_{x \rightarrow a^{-}} f(x) = \lim_{x \rightarrow a^{+}} f(x) = f(a)$

If $\lim_{x \rightarrow a^{-}} f(x) = f(a)$ , the function is left-continuous.
If $\lim_{x \rightarrow a^{+}} f(x) = f(a)$ , the function is right-continuous.
For the given function, the continuity is tested at the points in which the definitions are changed, x = 0 and x = 1.

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

At x = 0.

Approaching from the left, it is less than 0, thus:

$\lim_{x \rightarrow 0^-} f(x) = \lim_{x \rightarrow 0} x + 9 = 0 + 9 = 9$

Approaching from the right, it is more than 0, thus:

$\lim_{x \rightarrow 0^+} f(x) = \lim_{x \rightarrow 0} e^x = e^0 = 1$

The numeric value is:

$f(x) = e^0 = 1$

Since $[tex]\lim_{x \rightarrow 0^+} f(x) = f(0)$ , the function is right-continuous at x = 0.

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

At x = 1.

$\lim_{x \rightarrow 1^-} f(x) = \lim_{x \rightarrow 1} e^x = e^1 = e$

$\lim_{x \rightarrow 1^+} f(x) = \lim_{x \rightarrow 1} 4 - x = 4 - x = 3$

$f(1) = e^1 = e$

Since $[tex]\lim_{x \rightarrow 1^-} f(x) = f(1)$ , the function is left-continuous at x = 0.

A similar problem is given at brainly.com/question/21447009

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3 years ago

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KonstantinChe [14]

What is the fraction?

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3 years ago

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tyronne has $60,his sister has $135 ,they get $5 each week ,tyronne saves his money ,while his sister spends hers ,they get addi

ankoles [38]

Answer:

In 5 weeks they will have the same amount.

Step-by-step explanation:

1. You have that Tyronne has $60, she gets $5 each week and also gets an additional $10 each week. She saves her money. Therefore, you can write the following expression:

$60+5x+10x\\60+15x$

Where $x$ is the number of weeks.

2. Her sister has $135, she gets $5 each week and also gets an additional $10 each week, but she spends this money. Therefore:

$135+5x+10x-5x-10x\\135$

3. If this amounts of money will be equal, you have:

$60+15x=135\\15x=75\\x=5$

4. Therefore, in 5 weeks they will have the same amount.

6 0

4 years ago