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Greeley [361]
2 years ago
11

Alberto invests his $90 for 2 years at r % per year simple interest.

Mathematics
1 answer:
Sloan [31]2 years ago
4 0

Answer:

rate=55 percent

Step-by-step explanation:

SI=PRT

p=90

r=?

t=2

si=99

R=SI÷PT

R=99÷90×2

r=99÷180=0.55

r=0.55×100

R=55%

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A rectangle has a perimeter of 204 feet. It's length is six feet longer than twice it's width. If L stands for the length of the
Ratling [72]

Answer:

L = 70

W = 32

Step-by-step explanation:

P = 2L + 2W

P 204 feet

W = x

L  = 2x + 6

P = 2L + 2W

P = 2*(2x + 6) + 2*x

P = 4x + 12 + 2x

P = 6x + 12

But we know that P = 204  So 6x + 12 = 204

6x + 12 = 204                    Subtract 12 from both sides

6x + 12 - 12 = 204 - 12       Collect like terms on the right

6x = 192                             Divide by 6

x = 192/6

x = 32

Answer

W = 32

L = 2*W + 6

L = 2*32 + 6

L = 64 + 6

L = 70


7 0
3 years ago
The lunch lady has 3 pounds of lasagna left over. If she makes 1/6-pound servings, how many servings of
maksim [4K]

Answer:

⇒\frac{1}{6}×3

⇒\frac{1}{2}

Step-by-step explanation:

6 0
3 years ago
45 less than twice Jose’s savings. Use the variable J to represent Jose’s savings
allochka39001 [22]
The answer is
(J•2)-45=
8 0
3 years ago
Justify which of the following equations is a quadratic equation. If the equation is quadratic what is the value of a, b & c
White raven [17]

Answer:

x=5

Step-by-step explanation:

18x-11x-35=0

7x-35=0

7x=35

x=5

8 0
3 years ago
The manager of a baseball team has 15 players to choose from for his 9 person batting order
Masteriza [31]
Given the question:
The manager of a baseball team has 15 players to choose from for his 9-person batting order. How many different ways can he arrange the players in the lineup?
5,005    362,880    3,603,600    1,816,214,400

The number of was in which a smaller group is choosing from a bigger group is given by the bigger number combination the smaller number.
^nC_r= \frac{n!}{(n-r)!r!}
Here, we want to choose a 9-person batting order from a team of 15 players. This is given by:
^{15}C_9= \frac{15!}{(15-9)!9!}=\frac{15\times14\times13\times12\times11\times10\times9!}{6!\times9!}= \frac{3,603,600}{720} =5,005

6 0
3 years ago
Read 2 more answers
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