Calculate the value of a numeric expression: (-3,25 - 2,75) : (-0,6) + 0,8 * (-7).

katdoringlo
2022-09-13
Answered

Calculate the value of a numeric expression: (-3,25 - 2,75) : (-0,6) + 0,8 * (-7).

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asked 2022-08-04

the focal length f of a lens is given by the lensmaker's formula 1/f=0.6(1/r1+1/r2) where r1 and r2 are the radii of the two circular surfaces. If those radii are 4 and 6 respectively, find f.

A. 3/25

B. 4

C. 16/67

D. 1/4

A. 3/25

B. 4

C. 16/67

D. 1/4

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a) Write an equation in point-slope form of the line through the points.

b) Convert the equation to slope-intercept form.

c) Convert the equation to standard form.

d) Graph ther equation.

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b) Convert the equation to slope-intercept form.

c) Convert the equation to standard form.

d) Graph ther equation.

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Use the Gauss-Jordan method to solve the following system of equations.

$3x-4y+4z=10$

$3x+5y-z=15$

$12x-7y+11z=45$

Select the correct choice below and, if necessary, fill in the answer box to complete your choice.

A. The solution is ( _ , _ ,_ ) in the order x, y, z. (Simplify your answers.)

B. There is an infinite number of solutions. The solution is ( _ , _, _ ) where z is any real number. (Simplify your answers. Use integers or fractions for any numbers in the expressions.)

C. There is no solution.

Select the correct choice below and, if necessary, fill in the answer box to complete your choice.

A. The solution is ( _ , _ ,_ ) in the order x, y, z. (Simplify your answers.)

B. There is an infinite number of solutions. The solution is ( _ , _, _ ) where z is any real number. (Simplify your answers. Use integers or fractions for any numbers in the expressions.)

C. There is no solution.