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3 years ago

PLEASE HELP ME QUICKLY

Mathematics

2 answers:

mr Goodwill [35]3 years ago

8 0

Answer:

It would be 6.8

zhuklara [117]3 years ago

4 0

I believe that the answer would be 6.8

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Help pls im on a timed test * For people who search it up (3x)^3=3^1

wel

Answer:

Option D. x = -2

Step-by-step explanation:

Given equation:

$(3^x)^3 = 3^1$ .

$(3^3^+^(^-^2^)) = 3^1$

$= 3^1$ .

Your answer will be Option D.

6 0

2 years ago

What does 2 1/4 - 1 2/3?

Degger [83]

Answer:

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7 0

3 years ago

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Question 2b only! Evaluate using the definition of the definite integral(that means using the limit of a Riemann sum

lara [203]

Answer:

Hello,

Step-by-step explanation:

We divide the interval [a b] in n equal parts.

$\Delta x=\dfrac{b-a}{n} \\\\x_i=a+\Delta x *i \ for\ i=1\ to\ n\\\\y_i=x_i^2=(a+\Delta x *i)^2=a^2+(\Delta x *i)^2+2*a*\Delta x *i\\\\\\Area\ of\ i^{th} \ rectangle=R(x_i)=\Delta x * y_i\\$

$\displaystyle \sum_{i=1}^{n} R(x_i)=\dfrac{b-a}{n}*\sum_{i=1}^{n}\ (a^2 +(\dfrac{b-a}{n})^2*i^2+2*a*\dfrac{b-a}{n}*i)\\$

$=(b-a)^2*a^2+(\dfrac{b-a}{n})^3*\dfrac{n(n+1)(2n+1)}{6} +2*a*(\dfrac{b-a}{n})^2*\dfrac{n (n+1)} {2} \\\\\displaystyle \int\limits^a_b {x^2} \, dx = \lim_{n \to \infty} \sum_{i=1}^{n} R(x_i)\\\\=(b-a)*a^2+\dfrac{(b-a)^3 }{3} +a(b-a)^2\\\\=a^2b-a^3+\dfrac{1}{3} (b^3-3ab^2+3a^2b-a^3)+a^3+ab^2-2a^2b\\\\=\dfrac{b^3}{3}-ab^2+ab^2+a^2b+a^2b-2a^2b-\dfrac{a^3}{3} \\\\\\\boxed{\int\limits^a_b {x^2} \, dx =\dfrac{b^3}{3} -\dfrac{a^3}{3}}\\$

4 0

2 years ago

In a class, every student knows French or German (or both). 15 students know French, and 17 students know German. What is the la

Marina CMI [18]

Solution:

we are given that

In a class, every student knows French or German (or both).

15 students know French, and 17 students know German.

Suppose there are x student who knows both French and German.

Then Total number of student in the class will be $(15+17-x)=32-x$

But to guess the largest possible number of student in the class we can assume x=0

Hence the largest Possible number of Student in the class=32

6 0

3 years ago

It is 4:12 p.m. Emma's mom will be home from work in 70 minutes, and Emma has gymnastics lessons at 6:00 p.m. How much time will

Mademuasel [1]

We know that her mom will be home in 70 minutes and if its 4:12 then that means that her mom will be home at 5:22 because 70 minutes is 10 minutes more than an hour. If her gymnastics lessons are at 6:00 then she has 38 minutes in-between the time her mom gets home and her gymnastics lesson.

Hope this helped!

8 0

3 years ago