Pam walks along a road which can be modeled by the equation y=3x, where (0,0) represents her starting point. When she reaches the point (7,21), she turns right, so that she is traveling perpendicular to the original road, until she stops at a point which is due east of her starting point (in other words, on the x-axis). What is the point where Pam stops?

Can someone me my sister? she is in third grade. 50 points and brainlist! ones that are not answered. plz and thx!

Write the sentence as an equation. z plus 372 is equal to 160

Use addition and subtraction to simplify the following polynomials. a. add polynomials: (3 – 4x + 8x^2) + (–6 + 2x – 5x^2) step 1: rewrite the polynomials without the parentheses. step 2: write the polynomial in descending order and use parentheses around like terms. step 3: add the like terms identified in step 2 to simplify the polynomial. b. subtract polynomials: (3x – 5 – 7x^2) – (–2 + 6x^2 – 5x) step 1: rewrite the polynomials without the parentheses. remember to multiply each term in the second parentheses by –1. show your work. step 2: write the polynomial in descending order and use parentheses around like terms. step 3: add the like terms identified in step 2 to simplify the polynomial.