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agasfer [191]
3 years ago
7

У = 2х 3х + Зу = -18

Mathematics
2 answers:
eimsori [14]3 years ago
8 0
<h2>y = -4</h2><h2>x = -2</h2>

<h2>________________________</h2>

Step-by-step explanation:

y = 2x

<h3>y÷2 = x</h3>

<h2>------------------------------------------</h2>

so,

3x + 3y = -18

3(y÷2) + 3y = -18

3y ÷2 + 3y = -18

( 3y + 6y )÷2 = -18

9y ÷2 = -18

9y = -18 ×2

9y = -36

<h3>y = -4</h3>

<h2>-----------------------------------------</h2>

x = y÷2

x = -4÷2

<h3>x = -2</h3>

<h2>follow me</h2>

Troyanec [42]3 years ago
3 0

Answer:

x=-2,y=-4

Step-by-step explanation:

Substuting the value of y in second equation.

3x+3×2x=-18

9x=-18

x=-2

putting the value of x in equation 1 ,

y=-4

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Find the area and the perimeter of the shaded regions below. Give
PolarNik [594]

Based on the definition of <em>composite</em> figure, the area of the <em>composite</em> figure ABC formed by a semicircle and <em>right</em> triangle is approximately 32.137 square centimeters.

<h3>How to find the area of the composite figure</h3>

The area of the <em>composite</em> figure is the sum of two areas, the area of a semicircle and the area of a <em>right</em> triangle. The formula for the area of the composite figure is described below:

A = (1/2) · AB · BC + (π/8) · BC²     (1)

If we know that AB = 6 cm and BC = 6 cm, then the area of the composite figure is:

A = (1/2) · (6 cm)² + (π/8) · (6 cm)²

A ≈ 32.137 cm²

Based on the definition of <em>composite</em> figure, the area of the <em>composite</em> figure ABC formed by a semicircle and <em>right</em> triangle is approximately 32.137 square centimeters.

To learn more on composite figures: brainly.com/question/1284145

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8 0
1 year ago
9. Use the​ compound-interest formula to find the account balance​ A, where P is​ principal, r is interest​ rate, n is number of
IceJOKER [234]

Interest on interest, or compound interest, is the adding of interest to the principal sum of a loan or deposit. The account balance after a period of 5 years will be $1.63634×10²⁰.

<h3>What is compound interest?</h3>

Interest on interest, or compound interest, is the adding of interest to the principal sum of a loan or deposit. It's the outcome of reinvesting interest rather than paying it out so that interest is received on the principal plus previously collected interest in the next quarter.

A = P(1 + \frac{r}{n})^{nt}

A = final amount

P = initial principal balance

r = interest rate

n = number of times interest applied per time period

t = number of time periods elapsed

Given the principal amount is $12,385, the rate of interest is 7.5%, and the time period is daily. Therefore, the amount can be written as,

A = P(1 + \frac{r}{n})^{nt}\\\\A = \$12,385(1 + \frac{7.5}{365})^{(365 \times 5)}\\\\A = \$1.63634 \times 10^{20}

Hence, the account balance after a period of 5 years will be $1.63634×10²⁰.

Learn more about Compound Interest:

brainly.com/question/25857212

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5 0
2 years ago
While in transit, the antitoxin had to stay between 36ºF and 46ºF. The dogsled teams stopped along the route often to warm the a
eimsori [14]
Range is the difference between the largest and the smallest numbers in a given contest

Hence the range
= 46 - 36
= 10 °F
6 0
2 years ago
Please help, will give brainliest! :)
Nonamiya [84]

Answer:

the answer is 2>am sorry if wrong

6 0
2 years ago
If someone runs 4 meters per second, how many kilometers is that per hour?​
Vesna [10]

Answer:

14.4 km/h

Step-by-step explanation:

When finding km/h given m/s always multiply by 3.6

When finding m/s given km/h do the vice versa (divide by 3.6)

So.. 4km/h x 3.6 = <u>14.4 km/h </u>

6 0
3 years ago
Read 2 more answers
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