7. There are 25 dinosaurs in a specific Jurassic World Exhibit. Some are T-Rexes and some are triceratops. There are 92 legs total in the exhibit. Create 2 equations to represent this
situation. How many of each type dinosaur is there? (Assume that all of the dinosaurs have
the correct number of limbs.)

9514 1404 393

Step-by-step explanation:

For this we have to assume that the T-Rex has only 2 legs. Let r represent the number of T-Rex, and t represent the number of triceratops. The problem statement tells of two relationships:

  r + t = 25 . . . . . . total number of dinosaurs in the exhibit

  2r +4t = 92 . . . . total number of legs in the exhibit

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Multiplying the second equation by 1/2 and subtracting the first, we find ...

  (1/2)(2r +4t) -(r +t) = 1/2(92) -(25)

  t = 21 . . . . . . simplify

  r = 25 -21 = 4

There are 4 T-Rex, and 21 triceratops.

the final amount you will pay is $68.04.

the tip is determined by the pre-tax amount, so we calculate the tip based on the original bill, not after we've added sales tax.

to find the tip:

we can divide 54.00 by 100 to get 1% of 54. then we multiply that by 18.

54 / 100 = .54

.54 x 18 = 9.72

tip = 9.72$

to find the tax:

we can divide 54.00 by 100 to get 1% of 54. then we can multiply that by 8 to get 8%.

54 / 100 = .54

.54 x 8 = 4.32

tax= 4.32

now we can add the tip and tax to the bill to get our total.

54 + 9.72 + 4.32 = 68.04

total: $68.04

step-by-step explanation:

$655.61 which is option c

step-by-step explanation:

price of house =   $146,000

initial rate = 3.5%

mortgaged paid in this = 3.5 % of $146,000

                                        =

                                        =$5110

the total years would be = 7

total mortgaged paid = 7 * $5110

                                      =$35770

remaining money = $146000-35770

                                =$110230

new mortgaged payment = 5 % of 110230

                                            =  

                                            =$655.61