1. The correct statement is the first one, which is: <span>Add the two equations, solve for y, and then substitute –1 for y to find x.
</span>
2. Therefore, you have the following system of equations:
<span>
4x+8y=20
-4x+2y= -30
3. When you a</span>dd the two equations, and clear the variable "y", you obtain:
10y=-10
y=-1
4. Now, you must substitute -1 for y (y=-1) to find x, as below:
4x+8y=20
4x+8(-1)=20
4x-8=20
4x=20+8
4x=28
x=28/4
x=7
Answer:
it's right
Step-by-step explanation:
3x - 5 = 7
3x = 7 + 5
3x = 12
x = 12/3
x = 4
The value k = 5 will shift the parent function 5 units up. i.e. vertical shift of 5 units up.
Answer:
Writing the inequality, we have;

the solution to the inequality is;

Explanation:
Given that Natalie has $680 to spend at a bicycle store for some new gear and biking outfits.
Total spending must not exceed $680

She buys a new bicycle for $383.33.
• She buys 2 bicycle reflectors for $7.61 each and a pair of bike gloves for $22.01.
She plans to spend some or all of the money she has left to buy new biking outfits
for $32.43 each.
let x represent the number of biking outfits she can buy.
Total spending is;

Writing the inequality, we have;

we can now solve the inequality;

Therefore, the solution to the inequality is;