What is the efficiency of a machine that produces 4500 joules of output work for every 4250 joules of input work? (remember to put it in correct units and round to the hundredths place)

Peppermint patty is very discourged about her chances on a 10-item true-false quiz. if she randomly answers each question, what is her probability of getting a grade of at least 50% on a Two item quiz? Three item quiz? Four item quiz? Five item quiz?

Solve the system by substitution. Check your solution. 0.5x+0.25y=36 y+18=16x a. (36, 72) c. (49, 81) b. (9, 126) d. (21, 9)

Rachel jogged along a trail that was 1/4 of a mile long. she jogged around the trail 8 times. How many mile did Rachel jogged?

What is the prime factorization of 33

what is 2x116 and 4x17

If you have $19 and you spend $6 on baseball tickets, what fraction of your money did you spend?

Ruby is visiting San Francisco. From her hotel she walks 1 block west ans 4 blocks south to a coffee shop. Then she walks 5 blocks east and 6 blocks south to a museum. Where is the museum in relation to her hotel

A youth chorus has 30 members. There are 14 boys in the chorus. What is the ratio of boys to girls in simplest form? A. 7/15 B. 8/15 C. 7/8 D. 8/7

Each morning Papa notes the birds feeding on his bird feeder. So far this month he has seen 59 blue jays, 68 black crows, 12 Red Robin's and 1 cardinal. If 300 birds visit Papa's bird feeder, how many blue jays can we expect to see?

What value of c makes the polynomial below a perfect square? x2 + 16x + c c = A. 32 B. 64 C. 4 D. 256