What is the 60th term in an arithmetic sequence with the first term equal 1 and the constant difference equals 7

60th term of sequence is 414

Step-by-step explanation: An = a + (n-1)d

                                             Here n=60, a=1, d=7

                                             A60 = 1+(60–1)7

                                             A60 = 1+(59)7

                                             A60= 1+413

                                             A60 = 414

                                             Hence 60th term of sequence is 414

b

step-by-step explanation:

u take $75 minus $60.the anwer/original($75)multiply by 100

proofs involving isosceles triangles often require special consideration because an isosceles triangle has several distinct properties that do not apply to normal triangles.(more about triangle types) therefore, when you are trying to prove that two triangles are congruent, and one or both triangles, are isosceles you have a few theorems that you can use to make your life easier.

step-by-step explanation:

an isosceles triangle has two congruent sides and two congruent angles. the congruent angles are called the base angles and the other angle is known as the vertex angle. ∠bac and ∠bca are the base angles of the triangle picture on the left. the vertex angle is ∠abc