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2 years ago

Solve the system of equations. 3x – 4y = 8 18x – 5y = 10 X= Y=

Mathematics

2 answers:

ivolga24 [154]2 years ago

5 0

X = 0
Y = -2
You can plug them in just to check if you want

adell [148]2 years ago

5 0

Answer:

X = 0

Y = -2

Step-by-step explanation:

3x = 4y + 8

x = (4y + 8)/3

18 [(4y + 8)/3] - 5y = 10

6(4y + 8) - 5y = 10

24y + 48 - 5y = 10

19y = -38

y = -2 (Plug y into either one of the original formulas.)

18x - 5(-2) = 10

18x + 10 = 10

18x = 0

x = 0 (Check your work to make sure you have correct answers.)

3(0) - 4(-2) = 8

0 + 8 = 8

8 = 8 ;)

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in 2010 , a city's population was 55,210 and it was declining at a rate of 1.09% each year. which is the best prediction for whe

Anon25 [30]

Answer: 2023

Step-by-step explanation:

Since, the initial population of the city is 55,210,

And, it is declining at a rate of 1.09%.

Thus, the function that shows the population after x years since 2010 is,

$f(x) = 55210(1-\frac{1.09}{100} )^x$

$f(x) = 55210(1-0.0109)^x$

$f(x) = 55210(0.9891)^x$

If the population of town is 48000 in x years.

⇒ $55210(0.9891)^x= 48000$

⇒ $(0.9891)^x= 0.869407715993$

⇒ $x = 12.769$

Therefore, after 12.769 years the population of town will be equals to 48,000

⇒ After 12.770 years the population will first be below 48,000.

⇒ After approx 13 years the population will first below 48,000.

⇒ Around 2023 the population will be first below 48,000.

3 0

2 years ago

#1. The area of a square tile is 53.4cm^2. find the length of one side of the tile, rounded to the nearest 10th.

andrey2020 [161]

Problem 1

<h3>Answer: 7.3</h3>

Explanation: Apply the square root to the area to get the side length. This only applies to areas that are squares (hence the name).

==================================================

Problem 2

<h3>Answer: C) 1.3</h3>

Explanation: Use your calculator to find that choices A,B,D plugged into the square root function yield terminating decimal values. "Terminating" means "stop". This implies that they are perfect squares (though not perfect squares in the sense of whole number perfect squares which you may be used to). Choice C is the only value that has a square root that leads to a non-terminating decimal. The digits of this decimal go on forever without any pattern. The value is irrational.

sqrt(5.29) = 2.3 terminating decimal
sqrt(13.69) = 3.7 terminating decimal
sqrt(1.3) = 1.140175425 keeps going forever without any pattern
sqrt(0.09) = 0.3 terminating decimal

==================================================

Problem 3

<h3>Answer: 23.6 feet approximately</h3>

Explanation: Apply the square root to 15.5 to get roughly 3.937; this is the approximate side length of one square. Six of these tiles placed together will lead to a total length of roughly 6*3.937 = 23.622 which rounds to 23.6 feet. Like with problem 1, the square root being used like this only works for square areas.

5 0

3 years ago

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Brian parked in a parking garage 4 floors under ground. Herode an elevator up 17

Law Incorporation [45]

Answer:

Floor ride up to = 13 floor

Step-by-step explanation:

Given:

Parking garage = 4 floors under ground

Elevator up-to = 17 floor

Find:

Floor ride up to

Computation:

Floor ride up to = Elevator up-to - Parking garage

Floor ride up to = 17 floor - 4 floor

Floor ride up to = 13 floor

7 0

2 years ago

Find the missing terms in the<br>sequence 27, ? , 23, ? , 19,...<br>good luck

Vikki [24]

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2 years ago

Help! If anyone knows thanks

DerKrebs [107]

A:
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2 years ago

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