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3 years ago

I don't know how to do this

Mathematics

1 answer:

Gre4nikov [31]3 years ago

5 0

Answer:

x = -11/5 and y = 24/5

Step-by-step explanation:

Use elimination.

First, we need to multiply so that at least one variable can cancel out.

We can multiply the top equation by 2.

So we get

4x + 6y = 20

Then, we can use elimination.

The x's cancel out.

So we get 5y = 24

Or y = 24/5

Then, we can plug in this y value back into the first equation to find x.

2x + 3(24/5) = 10

2x + 72/5 = 50/5

2x = -22/5

x = -11/5

So x = -11/5 and y = 24/5

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Which of the following statements are true about checking accounts: (select all that apply) a:Some checking accounts require a l

andriy [413]

Answer:

A, B, C, D, F, G

Step-by-step explanation:

A. In order to stop overpayment when your account balance is low, some banks do require a low minimum balance so you don't use more money than you have

B. You can withdraw funds from a checking account easily by using an ATM or go into the bank.

C. There are many different kinds of checking accounts designed for specific activities.

D. One type of account is actually a Money Market account.

F. Some checking account can be joint so 2 or more people can access it (like wife and husband).

G. If you do overpay on your account, you will have to pay penalties for overspending.

E is incorrect because there are some few checking accounts that earn interest (very few).

H is incorrect because some banks require fees and restrictions.

5 0

4 years ago

En un hospital el 30 % de los pacientes que acuden de manera diaria presentan problemas cardíacos. Si un día acuden al hospital

juin [17]

Answer:

21 pacientes tienen problemas cardíacos de los 70 pacientes diagnosticados

Step-by-step explanation:

Paciente con problema cardíaco del total de pacientes diagnosticados = 30%

Total de pacientes que van al hospital en un día = 70

El total de pacientes con problemas cardíacos entre los 70 pacientes diagnosticados es

30% de 70 = 30/100 * 70 = 21

6 0

3 years ago

(04.02 MC)

lesya [120]

Answer:

The equation in standard form is:

Rx+Py = -PR

Step-by-step explanation:

The slope-intercept form of the line equation

$y = mx+b$

where

m is the slope

b is the y-intercept

Given

The y-intercept (0, -R)

The x-intercept (−P, 0)

Finding the slope between (0, -R) and (−P, 0)

$\mathrm{Slope}=\frac{y_2-y_1}{x_2-x_1}$

$\left(x_1,\:y_1\right)=\left(0,\:-R\right),\:\left(x_2,\:y_2\right)=\left(-P,\:0\right)$

$m=\frac{0-\left(-R\right)}{-P-0}$

$m=-\frac{R}{P}$

Thus, the slope between (0, -R) and (−P, 0) is:

$m=-\frac{R}{P}$

We know that the value of the y-intercept can be determined by setting x = 0, and determining the corresponding value of y.

We are given the y-intercept point (0, −R).

Thus, y-intercept b = -R

so substituting b = -R and $m=-\frac{R}{P}$ in the slope-intercept form to determine the line of the equation

$y = mx+b$

$y=-\frac{R}{P}x\:+\:\left(-R\right)$

$y=-\frac{R}{P}x\:-R$

So, the slope-intercept form of the line equation is:

$y=-\frac{R}{P}x\:-R$

Converting the slope-intercept form of the line equation into standard form

As we know that the equation in the standard form is

Ax+By=C

where x and y are variables and A, B and C are constants

$y=-\frac{R}{P}x\:-R$

so converting into standard form

Multiply the equation by P

Py = -Rx - PR

Add -Rx to both sides

Rx+Py = -Rx - PR + -Rx

Rx+Py = -PR

Therefore, the equation in standard form is:

Rx+Py = -PR

5 0

3 years ago

Java 1

KatRina [158]

Answer:

Q20 b.16

Q21 a.6

Step-by-step explanation:

count charcters Have a nice day! ==16

Q21 why 6

because index start with 0 and not 1

just count

H ==> 0

e==> 1

l==> 2

W=>6

6 0

3 years ago

Fractii.(1supra12+1supra24-1supra36):(1supra4+3supra5)×2antregi3supra7

ANEK [815]

Answer:

$\large\boxed{\large\boxed{\dfrac{35}{459}}}$

Explanation:

Fractions:

$\bigg(\dfrac{1}{12}+\dfrac{1}{24}-\dfrac{1}{36}\bigg):\bigg(\dfrac{1}{4}+\dfrac{3}{5}\bigg)\times \dfrac{2}{3}$

1. Solve the first parenthesis:

$\dfrac{1}{12}+\dfrac{1}{24}-\dfrac{1}{36}=\dfrac{6+3-2}{72}=\dfrac{7}{72}$

2. Solve the second parenthesis:

$\dfrac{1}{4}+\dfrac{3}{5}=\dfrac{5+12}{20}=\dfrac{17}{20}$

3. Solve the division:

$\dfrac{7}{72}:\dfrac{17}{20}=\dfrac{7}{72}\times \dfrac{20}{17}=\\ \\ \\ =\dfrac{7\times 20}{72\times 17}=\dfrac{7\times 5}{18\times 17}=\dfrac{35}{306}$

4. Multiply by the last fraction:

$\dfrac{35}{306}\times \dfrac{2}{3}=\dfrac{35}{153\times 3}=\dfrac{35}{459}$

6 0

3 years ago

I don't know how to do this​

I don't know how to do this