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mafiozo [28]
3 years ago
5

I really need help asap please

Mathematics
1 answer:
gizmo_the_mogwai [7]3 years ago
5 0
We can use the substitution method to solve this problem.

The second equation is \sf y=2x, so we can plug in 2x for 'y' in the first equation:

\sf 5x-2y=3

\sf 5x-2(2x)=3

Multiply:

\sf 5x-4x=3

Combine like terms:

\sf x=3

This is the x-value of our solution, we can plug this into any of the two equations to find the y-value:

\sf y=2x

\sf y=2(3)

Multiply:

\sf y=6

This is the y-value of our solution. So our entire solution is (3, 6).
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Which of the following would be a good argument to lease rather than buy?
Arturiano [62]

Answer: B. I prefer the warranty that covers repair costs of a new car

5 0
3 years ago
Read 2 more answers
Kendra has $ 7.75 $7.75 in nickels and quarters. if she has 13 13 more quarters than nickels, how many of each coin does she hav
Ludmilka [50]
Total of $7.75
13 more quarters than nickels

15 nickels = $0.75
28 quarters = $7.00

28 - 15 = 13 coins
$7.00 + $0.75 = $7.75


She has 15 nickels and 28 quarters.
7 0
3 years ago
BRAINLIESTI HAVE 10 MINS
VladimirAG [237]
Correction -125* I think
7 0
3 years ago
What’s the formula to -1/2,-3/10,-9/50,-27/250,....
laila [671]

Answer:

The formula is ⇒ \frac{-1}{2}(\frac{3}{5})^{n-1}

Step-by-step explanation:

∵ The sequence is -1/2 , -3/10 , -9/50 , -27/250

∵ (-3/10) ÷ (-1/2) = 3/5

∵ (-9/50) ÷ (-3/10) = 3/5

∴ It is a geometric sequence

∴ The formula is Tn = ar^(n - 1)

Where a is the first term , r is the constant ratio between each two consecutive terms and n is the position of the number

∴ Tn = -1/2 ( 3/5)^(n - 1)

∴ Tn= \frac{-1}{2}(\frac{3}{5})^{n-1}  

5 0
3 years ago
What is the conditional relative frequency of selling an item marked 50% off, provided the item sold is item 2?
sukhopar [10]

Answer:

Conditional relative frequency = 0.67

Step-by-step explanation:

               50% off        Buy 1, get 1 free      Total

Item 1         12                       8                      20

Item 2         20                      10                     30

Total           32                      18                     50

Condition relative frequency table:

               50% off        Buy 1, get 1 free      Total

Item 1         \frac{12}{20}=0.6             \frac{8}{20}=0.4            \frac{20}{20}=1

Item 2        \frac{20}{30}=0.67           \frac{10}{30}=0.33          \frac{30}{30}=1

Total            \frac{32}{50}=0.64           \frac{18}{50}=0.36          \frac{50}{50}=1

Therefore, conditional relative frequency of selling an item marked 50% off, provided the item sold is item 2 = 0.67

8 0
3 years ago
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