What is the x-value of the solution to the system of equations?
5x + 4y = 8
2x - 3y =17

x = 4

Step-by-step explanation:

Solve the following system:

{5 x + 4 y = 8 | (equation 1)

2 x - 3 y = 17 | (equation 2)

Subtract 2/5 × (equation 1) from equation 2:

{5 x + 4 y = 8 | (equation 1)

0 x - (23 y)/5 = 69/5 | (equation 2)

Multiply equation 2 by 5/23:

{5 x + 4 y = 8 | (equation 1)

0 x - y = 3 | (equation 2)

Multiply equation 2 by -1:

{5 x + 4 y = 8 | (equation 1)

0 x+y = -3 | (equation 2)

Subtract 4 × (equation 2) from equation 1:

{5 x+0 y = 20 | (equation 1)

0 x+y = -3 | (equation 2)

Divide equation 1 by 5:

{x+0 y = 4 | (equation 1)

0 x+y = -3 | (equation 2)

Collect results:

 {x = 4 , y = -3

answer set (b) 0.5, 3/4 80% is in order from least to greatest.  

step-by-step explanation:

in order to compare rational numbers to each other, it is much easier if they are in the same form.   typically, the best form in which to evaluate rational numbers is in decimals.   in order to convert a percent to a decimal, you would divide the given percentage by 100.   you can also accomplish the conversion by moving the decimal point over two places to the left.   for example, the decimal value of 80% is 80/100, or 0.8.   in order to convert a fraction to a decimal, you need to divide the numerator by the denominator.   for example, 3/4 is 0.75.   so, for choice (b) 0.5 3/4 (0.75), 80% (0.8) is the only choice in which the numbers are in order from least to greatest.  

option c) graph of line going through 1, 4 and 3, 10

step-by-step explanation:

let y equal to margo's coin collection

let x equal to number of years

at the begining x=0, y=1 → point=(x,y)→point=(0,1)

she adds 3 coins per year, then y=1+3x

at x=1, y=1+3(1)=1+3→y=4→point=(x,y)→point=(1,4)

at x=3, y=1+3(3)=1+9→y=10→point=(x,y)→point=(3,10)

the graph of line going through (1, 4) and (3, 10), then the option c is the correct.