Triangle XYZ is reflected across the y-axis and then dilated. Which describes the dilation used to create triangle X'Y'Z? D2 D3

Mary used 1/7 of a spool of ribbon to complete 4 projects. she used the same amount of ribbon on each project. how much ribbon did she use on each project?

Which of the following functions corresponds to the above sinusoid? a. 10 cos πx - 5 b. -5 sin x - 5 c. -10 cos πx/2 - 0.5 d. 10 sin πx - 5

Which expression is the factorization of x^2+10+21