Choose all that give a correct first step to solve the system of equations by the elimination method. equation a: 3x + 4y = 52 equation b: 5x + y = 30 multiply equation b by ? 4 equation a: ? 2x + 3y = ? 1 equation b: x + 5y = 25 multiply equation b by 2 equation a: 2x + y = 2 equation b: ? 3x + 3y = 10 multiply equation a by 5 equation a: 4x + y = 3 equation b: 6x + 3y = 9 multiply equation a by ? 3

Multiply equation B by 4.

Step-by-step explanation:

Solve equation A 3x + 4y = 52 and equation B 5x + y = 30 by multiplying equation B by 4.

This becomes 3x + 4y = 52 and 20x + 4y = 120.

Subtract the equations.

3x + 4y = 52

20x + 4y = 120

-17x = -68

Divide by -17.

x = 4

Substitute x = 4 and solve for y.

3(4) + 4y = 52

12 + 4y = 52

4y = 40

y = 10

for the friend request.

when a figure, such as triangle (xyz) is reflected over the line y = x to create x'y'z' the x-coordinates and y-coordinates of the original image (pre-image) will be reversed for the image. (e.g., (x, y) > (y, x)) this means that the pre-image position of the x- and y-coordinates switch places which in turn provides a mirror like image of the original xyz.  

i notice that when i draw a line segment from x to x', that the points are parallel from each other -- they are exactly across from each other and do not intersect with any other points.  

yes, think i would see the same characteristic if you drew the line segment connecting y with the reflecting line and then y' with the reflecting line because of the essence of reflections. because it is a mirror image, each point was effected the same way which leads me to conclude that they same would apply to y and y'.

total amount of money that he should pay if he has not used his duty free exemption is $98

step-by-step explanation:

given a united states citizen returning to the states declares the following items at the customs office: 3 shirts at $8.50 each 2 dresses at $27.50 each 1 pair of gold cuff links at $17.50 per pair. we have to find how much he pay

cost of 3 shirts if one cost at $8.50 is

cost of 2 dresses if one cost at $27.50 is  

cost of 1 pair of gold cuff at $17.50

so, total amount of money that he should pay if he has not used his duty free exemption is   $25.5+$55+$17.50=$98