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suter [353]
3 years ago
12

9x-2y=19 7x=21 can you please help me answer this question

Mathematics
1 answer:
avanturin [10]3 years ago
3 0
We have such system of eq
\left \{ {{9x-2y=19} \atop {7x=21}} \right.
First lets solve second eq
7x=21   /:7   divide both sides by 7
x=3
Now we can substitute it to first equation
9x-2y=19
9*3-2y=19
27-2y=19    /-27 subtract 27 both sides
-2y=-8     /:(-2)  divide both sides by -2
y=4 - its the answer

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Question 7 of 10
Gelneren [198K]

The group of values plugged into the TVM Solver of a graphing calculator that will return the amount of a 25-year loan with an APR of 16.8%, that is paid off with monthly payments of $340 is:

A. N=300; 1%-1.4; PV = PMT=-340; FV=0; P/Y=12; C/Y=12;PMT:END

What is monthly compounding?

Monthly compounding in this case the number of payments would be the number of monthly payments in 25 years, which is 300 monthly payments(i.e. 12*25=300), this means that options B and D are obviously incorrect because number of payments, N is given as 25( 25 years instead of 300 months)

What is monthly interest rate?

The monthly interest is the annual interest rate of 16.8% divided by 12, which is 1.40%, in short, option C is also wrong because I/Y(monthly interest rate) was as shown as an interest rate of 16.8% instead of 1.40%

Overall, the correct option is A, because the number of payments and interest rate were stated correctly, unlike other options that were incorrectly written

Find out about more about TVM Solver notations on:brainly.com/question/14586708

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5 0
2 years ago
Solve the simultaneous equations:<br><br> 3a-2b=14 <br> 12a+9b=39
kirill [66]
Use elimination
Multiply first equation by 4
12a - 8b = 56
12a + 9b = 39
Subtract both
-17b = 17
b = -1
Plug in -1 for b
3a - 2(-1) = 14
3a = 12, a = 4
Final answer: a = 4, b = -1
5 0
3 years ago
Part 1 - Application Pick one of the two graphs below. Describe a situation which could be modeled by this polynomial graph. Be
Goryan [66]

One good example of a situation that can be modeled by this Polynomial Graph is the price-time relationship between currency pairs being traded on the Foreign Exchange Market.

<h3>What is a Polynomial Graph?</h3>

A polynomial parameter graph is essentially a smooth continuous curve.

Although the forex graph attached has sharp undulations, when regressed and viewed via Polynomial Regression Indicators, they exhibit strong polynomial qualities that meet the requirements of the definition above.

It is to be noted that the Y-Axis is indicative of the price of the currency pairs (which could be any currency against another) and the X-Axis expresses time. See the attached graphs for a better picture.

Learn more about polynomial graphs at:
brainly.com/question/9696642
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6 0
2 years ago
When full, a cinema house has n people. When 280 people have taken seat the remaining seats comes to $384 if each tickets cost $
Yuki888 [10]
I don’t understand the question, can you restate it?
5 0
3 years ago
Read 2 more answers
The table below represents the distance of a car from its destination as a function of time.
KIM [24]
We are given the table that projects the distance of the car per hour. x is associated to time while y is associated to distance. The equation of the line after plotting in MS Excel is y = 900 - 50x. Hence the y-intercept is equal to 900 while the slope is equal to -50. The domain of the function that is x is all positive numbers. 
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