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3 years ago

If "/ " means "-", "+" means "/", "" means "+" and "_" means "" find the value of expression:

1 answer:

4 0

After substituting in what the symbols are really supposed to be it looks like this: 19-33/11+5*20. Use PEMDAS and plug it in to a calculator
NO parenthesis
NO exponents
Multiplication: 5*20=100
19-33/11+100
Division: -33/11= -3
19-3+100
Addition: -3+100= 97
19+97
ANSWER: 116

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The average value of a function f over the interval [−2,3] is −6 , and the average value of f over the interval [3,5] is 20. Wha

Xelga [282]

Answer:

The average value of $f$ over the interval $[-2,5]$ is $\frac{10}{7}$ .

Step-by-step explanation:

Let suppose that function $f$ is continuous and integrable in the given intervals, by integral definition of average we have that:

$\frac{1}{3-(-2)} \int\limits^{3}_{-2} {f(x)} \, dx = -6$ (1)

$\frac{1}{5-3} \int\limits^{5}_{3} {f(x)} \, dx = 20$ (2)

By Fundamental Theorems of Calculus we expand both expressions:

$\frac{F(3)-F(-2)}{3-(-2)} = -6$

$F(3) - F(-2) = -30$ (1b)

$\frac{F(5)-F(3)}{5-3} = 20$

$F(5) - F(3) = 40$ (2b)

We obtain the average value of $f$ over the interval $[-2, 5]$ by algebraic handling:

$F(5) - F(3) +[F(3)-F(-2)] = 40 + (-30)$

$F(5) - F(-2) = 10$

$\frac{F(5)-F(-2)}{5-(-2)} = \frac{10}{5-(-2)}$

$\bar f = \frac{10}{7}$

The average value of $f$ over the interval $[-2,5]$ is $\frac{10}{7}$ .

4 0

3 years ago

If f(t)=3t^2+11 find f(7)

tamaranim1 [39]

Answer:

f(7) = 158

Step-by-step explanation:

To evaluate f(7) substitute t = 7 into f(t)

f(7) = 3(7)² + 11 = (3 × 49) + 11 = 147 + 11 = 158

6 0

4 years ago

Read 2 more answers

Write the formula for the parabola that has x-intercepts (1.3,0) and (-1.3,0), and y intercept (0,169)

stepan [7]

It is 3.25/5.40 I think

5 0

3 years ago

Mary is making a pinata that has a ball-like shape. The pinata has a surface area of 40 feet. Use the formula for the surface ar

Neko [114]

$S=4\pi r^2\ \ \ and\ \ \ S=40\ [feet]\ \ \ \Rightarrow\ \ \ 4\pi r^2=40\ /:4\pi\\ \\r^2= \frac{10}{\pi} \ \ \ \Rightarrow\ \ \ r= \sqrt{ \frac{10}{\pi}} \ \ \ \Rightarrow\ \ \ \ r\approx1.78\ [feet]$

7 0

3 years ago

Construct an inscribed circle in triangle PQR by finding the incenter of the triangle.

kotegsom [21]

Answer:

Step-by-step explanation:

To inscribe a circle in a given triangle PQR means to construct a circle in the triangle PQR. The incenter of a triangle is the midpoint in the triangle, which can be located by bisecting the three angles of the triangle individually.

The construction is shown in the attachment.

7 0

4 years ago

If "/ " means "-", "+" means "/", "*" means "+" and "_" means "*" find the value of expression:

If "/ " means "-", "+" means "/", "" means "+" and "_" means "" find the value of expression: