Which of the following equations have infinitely many solutions? Choose all answers that apply: a--19x+91=-19x+91 b--19x-38=-19x-38
c- -19x-19= -19x-19
d- -19x-19= -19x+19
PLEASE HELP- RIGHT ANSERS ONLY- WILL MARK BRINLIST FIRST TO ANSER CORRECTLY

Write a polynomial function f of least degree that has rational coefficients, a leading coefficient of 1, and the given zeros. 3, 4+2i, 1+(sqrt)7 the answer is supposed to be: f(x)=x(^5)-13x(^4)+60x(^3)-82x(^2)- 144x+360 what am i doing wrong?

Exclude leap years from the following calculations. (a) compute the probability that a randomly selected person does not have a birthday on october 4. (type an integer or a decimal rounded to three decimal places as needed.) (b) compute the probability that a randomly selected person does not have a birthday on the 1st day of a month. (type an integer or a decimal rounded to three decimal places as needed.) (c) compute the probability that a randomly selected person does not have a birthday on the 30th day of a month. (type an integer or a decimal rounded to three decimal places as needed.) (d) compute the probability that a randomly selected person was not born in january. (type an integer or a decimal rounded to three decimal places as needed.)

Find the value of the variable and the length of each chord for #5 and #6.