Jon buys fencing for his yard. He pays $122 for 5 fence posts and 4 panels. He pays $570 for 21 fence posts and 20 panels. How much would he pay for 4 fence posts and 3 panels?

Is the figure congruent? yes or no?

Ascientist has 50 grams of a radioactive element. the amount of radioactive element remaining after t days can be determined using the equation (1) after two days the scientist receives a second shipment of 50 grams of the same element. the equation used to represent the amount of shipment 2 remaining after t days is 10) - 50 which of the following is an equivalent form of the expression for the amount remaining in shipment 2? what’s the answer?

Angie has saved 3/8 of the amount she needs to buy a bike. clive has saved 7/10 of the amount he needs to buy a skateboard. what is the difference between clive's and angie's fraction of savings?