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Nesterboy [21]
3 years ago
7

Please help me on this question and explain your answer thanks

Mathematics
1 answer:
Arte-miy333 [17]3 years ago
4 0
Each variable used is the first letter of each of their names.

t+b+c=87
c=2t
b=t+7

Substitute for b and c
t+ (t+7)+2t= 87
4t+7=87
4t=80
t=20

Plug in the known t value.
c=2(20)
c=40

b=20+7
b=27

Final answer: Tammy=$20, Boris= $27, Carlos=$40
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47.9 less than k is -21.6
Law Incorporation [45]
K is equal to -69.5 K=69.5 You put it in an equation 47.9-K=-21.6Then you subtract 47.9 from both sides and you get K=69.5 
3 0
3 years ago
Find the value of c such that y= x + c is a tangent to the parabola y = x squared - x - 12
Bond [772]

Answer:

c = –13

Step-by-step explanation:

by property of tangent line, equation

x² – x – 12 = x + c

x² – 2x – 12 – c = 0

has only one solution, which mean

– 12 – c = 1

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5 0
3 years ago
the initial price of a home entertainment system is $34,000. It is discounted by 10% and then by a further 26%. Find the price o
maria [59]
The final price of the item is $22,644

The initial discount of 10% leaves the price at 90% of the retail value:
\frac{x}{34000}  =  \frac{90}{100}
cross multiply to solve for x:
100x = 3,060,000
x = 30,600
This new price is then discounted 26%, which means the final price is 74% of $30,600:
\frac{x}{30600}  =  \frac{74}{100}
cross multiply to solve for x:
100x = 2,264,400
x = 22,644
The final price of the home entertainment system is $22,644
8 0
3 years ago
At combs store there is a 25% chance a customer enters the store within one minute of closing time. Describe the complementary e
12345 [234]
The complementary event is that a customer does not enter the store within one minute of closing, and the probability is 75%.

The complement is found by subtracting from 100%; 100-25 = 75%.
6 0
3 years ago
Find the GCF of the following monomials.<br> -50m⁴ n⁷ and 40m² n¹⁰
babunello [35]
Greetings!

We can factor this expression/ the GCF is:
-10m^2n^7

(-10m^2n^7)(5m^2-4n^3)

Hope this helps.
-Benjamin
8 0
3 years ago
Read 2 more answers
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