8 12 x 3. (a) Estimate the area under the graph of f(x) = cos x from x = 0 to x = π/2 using four approximating rectangles and right endpoints. Sketch the graph and the rect- angles. Is your estimate an underestimate or an overestimate? (b) Repeat part (a) using left endpoints.

Q: 5. If a number plus 4 equals two times 6, what is the number?

A:

Q: 2/7 + -4/3

A: Given,

Q: 3y² - 2y-1 (-)-5y²- 2y +6

A:

Q: (1,-16) and (-3,12)

A: To write down the equation of the straight line joining the two given points.

Q: From the list below, select the values of x for which f'(x) > 0. 2 -1 None of the listed x values -3…

A: Given graph of function

Q: C3x2 + – 4 kx - 5x- 6.

A:

Q: 3 x+2y=-13 -5x+4y=18

A: given: 3x+2y=-13 -5x+4y=18

Q: X+X+y if x = 9 and y = 3

A: Given data is x = 9 and y = 3   find x + x + y = ?

Q: -9 -3 -2 -6 3- 6. -4 -6 -8- -10+

A: Given,    The graph is shown below:

Q: 4x + 2y=8 6x - 4y=5

A: Given4x+2y=8 and    --- Eq 16x-4y=5           --- Eq 2We solve for x and yFrom Eq 1:2y=8-4x…

Q: order of (Z4, +4) for each element

A: order of (Z4, +4) for each element

Q: 4 1/2 + 3 2/3=

A: Given,

Q: -5,4y+14-2y=4

A: Given ,  4y + 14 - 2y = 4     ....... (1)  We have to find value of y  (1) implies

Q: 9y-3=19-2y

A: 9y-3=19-2y

Q: x+y=6 x-y=2

A:

Q: How do I find numbers 2 and 4?

A:

Q: 4=6/2x-3

A: Given query is to find the value of x.

Q: how did you get infinity

A: we need to know that limx→∞(x)=∞ and limx→∞x2=∞and∞=∞

Q: 25=2x-3

A: solving for x 25=2x-3

Q: x + y+ z = 2 2 2.

A: Given surface is z=f(x,y)=2-x-y Now , volume of the solid is where R is projection of the solid in…

Q: 4+b=30

A: It is addition and subtraction of numbers.