All categories

3 years ago

Solve for x and y: x+y=5 x−y=a PLEASE I NEED MY ANSWER TILL TOMORROW MORNING!

Mathematics

2 answers:

Daniel [21]3 years ago

8 0

Answer:

x=5/2 + a/2, y= 5/2 - a/2

Step-by-step explanation:

We can solve this system using addition of the equations

x+y=5

x-y=a

2x =(5+a)

x=(5+a)/2= 5/2 +a/2

x=5/2 +a/2

x-y=a

y = x - a , x=5/2 + a/2

y= 5/2 + a/2-a

y= 5/2 - a/2

Read more on Brainly.com - brainly.com/question/12520369#readmoreStep-by-step explanation:

KengaRu [80]3 years ago

7 0

Answer:

x= $\frac{a+5}{2}$ y=5- $\frac{a+5}{2}$

Step-by-step explanation:

x+y=5

y=5-x

x-y=a

x-(5-x)=a

2x-5=a

2x=a+5

x= $\frac{a+5}{2}$

x+y=5

$\frac{a+5}{2}$ +y=5

y=5- $\frac{a+5}{2}$

You might be interested in

Please help me with 5,6,7 it’s due tomorrow it doesn’t have to be all three please help me with the one you can help with

Finger [1]

The answer for
number 6 A is 36≠24

5 0

3 years ago

What do I do next???

Novay_Z [31]

Answer: You have to get rid of the variables (the x's) so subtract 2x from 2x and 11x then go from there.

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers

Can anyone explain? Please let me know!

tino4ka555 [31]

Answer:

C: Lucy can type 120 words in 4 minutes

Step-by-step explanation:

I the ratio is 30: 1 that means Lucy can type 30 words in 1 minuet

So multiply 30 by 4 and that would be 120

30 represents words so Lucy can type 120 words per 4 minuets

7 0

3 years ago

QUESTION 9 1 POINT Find the equation of a line that contains the points (-2,-5) and (3, -1). Write the equation in slope-interce

svet-max [94.6K]

Answer:

If only slope:

$y = \frac{4}{5}x + b$

If slope and y-intercept:

$y = \frac{4}{5}x - 6.6\\or\\y = \frac{4}{5}x - 3.4$

*both are correct answers see steps below*

Step-by-step explanation:

The equation to find the slope is $\frac{y_{2} - y_{1}}{x_{2} - x_{1}}$ .

The equation for slope-intercept form is $y = mx + b$ .

First, find the slope between two points.

$\frac{-1 - (-5)}{3 - (-2)} = \frac{4}{5}$

Keep the difference as a fraction if it can't be divided.

Next, plug in the slope value into the equation.

$y = \frac{4}{5}x + b$

If you also need to find what b is, pick a point; (-2, -5) OR (3, -1). Then fill in the equation with it's x and y values. (I'll do both points to show two different results).

Point (-2, -5):

$(-5) = \frac{4}{5}(-2) + b$

$(-5) = (-1.6) + b$

Add 1.6 on both sides to isolate the b. (since -1.6 is a negative, we need to cancel it out with its opposite)

$b = -6.6$

Point (3, -1):

$(-1) = \frac{4}{5}(3) + b$

$(-1) = (2.4) + b$

Subtract 2.4 on both sides to isolate the b. (since 2.4 is a positive, we need to cancel it out with its opposite)

$b = -3.4$

It does mean that both slopes have different y-intercepts but it overly depends on the point. These steps will ensure you to the correct answer.

3 0

2 years ago

Can someone pretty please help i just don't get the last part:( It says the following shows the estimated population and annual

saw5 [17]

Step-by-step answer:

It is not clear what the question exactly wants, but here's the best I can do with possible interpretations.

Let P(t) = population t years after 2000, then

P(t) = (N0)e^(Rt)

where

N0=population of year 2000 = 19169000

R=rate of growth, in ratio = 0.006

e=base of natural logarithm = 2.7182818284...

Then

P(25) = 19169000*e^(0.006*25)

= 19169000*e^(0.15)

= 22271200.59885846

= 22271201

Not sure what it means "the other value", as we only have one.

8 0

3 years ago