Mathematics High School

x+y=5
3x-y=-5
is it no solutions, all solutions, or one solution?
please show your work.

Answers

Answer 1

Answer:

One solution

Step-by-step explanation:

x+y=5

3x-y=-5

Add the equations together will get you:

4x=0

Divide the 0 by 4 to get the x alone will get you

x=0

Answer 2

Answer:

There's one solution

(0,5)

Step-by-step explanation:

There's one solution

We can tell this is true because of the 3x in the second on and just hte x in the first. If you look closely you'll see the coefficents for the x values is the only difference between the two.

Let's now solve

We need to get a positive variable by itself

let's take x+y=5 and solve for y

x-5= -y

y= -x+5

We can then plug this y value into the other equation

3x-(-x+5)= -5

3x+x-5= -5

4x= 0

x=0

Let's then plug this value in for x into any of the beginning equations

0+y=5

y=5

Related Questions

-2(x-4)=4 can x=2 be the solution

Answers

Answer:

Step-by-step explanation:

-2x + 8 = 4

-2x = 4 - 8

-2x = - 4

x = - 4/-2 = 2

replace x with 2 on the equation

-4-4=4

so answer is no

-8=4 not possible

please help 11 points and will give brainelist

Answers

C
81 + 56 + 43 = 180 = measure of triangles

Answer:

i believe it should be C

Step-by-step explanation:

dont forget to say thanks

brainelist??

3x+25=2(4x-10)

Can somebody plz explain to me how to solve this

Answers

3x+25=2(4x-10)
3x+25=8x-20
+20 +20 (factor and match like terms)
3x+45=8x
-3x -3x
45=5x
X=9

A temperature in degrees Fahrenheit is shown in expanded notation. ( 9 × 10 ) + ( 4 × 0.1 ) How is this temperature in degrees Fahrenheit written a numeral?

Answers

Answer:

90.4 degrees.

Step-by-step explanation:

(9 x 10) + (4 x 0.1)

= 90 + 0.4

= 90.4.

The Temperature in Fahrenheit  is 90.4 F.

What is Expanded form?

The division of numbers into groups according to place value, such as ones, tens, hundreds, thousands, ten thousand, and so forth, results in the expanded form of the number. The expanded version of the number is the one that is represented by the sum of each digit times its place value.

Given:

Expanded notation. ( 9 × 10 ) + ( 4 × 0.1 )

Now, simplifying the expression

= (9 x 10) + (4 x 0.1)

= 90 + 0.4

= 90.4.

Hence, the Temperature in Fahrenheit  is 90.4 F.

Learn more about Expanded form here:

https://brainly.com/question/17837892

#SPJ5

Tim has completed five math problems and 13 minutes if he continues at the same rate how long will it take him to finish 20 problems

Answers

Answer:

52 minutes

Step-by-step explanation:

it takes him 13 minutes to complete 5 so if he wants  to do 20 problems  do 20 divided by 5 (4) then do 13 times 4=52

Charlotte and Edgar's ages add up to 22. Charlotte is one year
older than twice Edgar's age.
How old are Charlotte and Edgar? Show all of your work and/or
reasoning.

Answers

Answer: Charlotte's 15 and Edgar's 7

Step-by-step explanation:

7*2=14

14+1 = 15

15 + 7 = 22

Circle all of the equations
that are nonlinear.
A. y = 5 + x
B. xy = 4
C. y = 7x4
D. 2x - y = 8

Answers

Answer:

B and C

Step-by-step explanation:

Just not linear lol

help me plzz. Thank you guys!!!!!!

Answers

Answer:

C. The y-intercepts of the two functions are opposites.

Step-by-step explanation:

The y-intercept of g(x) is -1 and the y-intercept of h(x) is 1. -1 and 1 are opposites, so the two y-intercepts are also opposites.

A library is having a book sale. Hardcover books sell at $5 and paperbacks are $3
each. If buys 12 books and spends exactly $54, how many of each type of book
did she buy?
Please helppppp

Answers

9•5=45 and 3•3=9 so 9+45=54 so 9 hardcovers are bought and 3 paper backs are bought.

HELP MEEEE!!!!!!!!!!!!!!!!!!!! I will give brainliest to whoever answers first.

Answers

A. Multiply the 2 numbers.

Hiro painted his room at a rate of 8 square meters per hour. After 3 hours of painting, he had 28 square meters left to paint. Let A(t) denote the area to paint A (measured in square meters) as a function of time t (measured in hours). What is the Functions formula? A(t)=?​

Answers

Answer:

cgnnjfcjifchhgsiwjcjcbanxjdhw

i need help! i’ll give brainliest

Answers

Answer:

>

Step-by-step explanation:

Answer:

You would use >

Step-by-step explanation:

-1/4 is greater. When you divide -1/4 you get -0.25. In negatives, the number that's the CLOSEST to 0 is greater. Since -0.25 is closer to 0 than -0.42, the answer is that -1/4 is GREATER than -0.42.

Hope this helps!

please help me, I am so confused. Thanks​

Answers

Answer:

c. 80

Step-by-step explanation:

cos x = sin(x-70)

cos x = cos [90-(x-70)]

cos x = cos (90-x +70)

cos x = cos 160 -x

x= 160-x

2x = 160

x =80

Please help me there can only be one answer

Answers

Answer:-
I think it’s the last option where x and y both are zero.
2x + 2y = 0
Here x = 0 and y = 0.
Hope it helps if u hv any questions feel free to ask...hv a grt day :)

Suppose g(x) = f(x - 1) - 5. Which statement best compares the graph of
g(x) with the graph of f(x)?

Answers

D is your answer i believe

Step-by-step explanation:

using g(x), -1, which is our change of x will go right. -5 is our change in y, so therefore it goes down. negative means down, positive means up for our change of y. for our change of x, negative goes right, and postive goes left. thats why i think the answer is d

. A recipe calls for 2/3 cup of sugar for every 1/2 teaspoon of vanilla.
What is the unit rate of cups per teaspoon?

Answers

X= 4/3 = 1 1/3 cups.
1 1/3 cups per 1 teaspoon of vanilla
To get to 1 tbs we multiply 1/2 by 2
If you do that to one side you have to do it to the next
2/3 x 2 is 4/e which simplifies to 1 1/3

whats 76x34 div 4^2?

Answers

Answer:

1241/8 x

Step-by-step explanation:

73x(34)/42

Answer: 161 1/2

Step-by-step explanation: 76*34= 2584 and 4^2=16

so the question is basically 2584 divided by 16. 2584/16=

Fraction: 161 1/2. Decimal: 161.5

The scale on a map of Oregon is 1 inch = 5000 feet What is the scale factor?

Answers

Answer:

C

Step-by-step explanation:

Answer:

Step-by-step explanation: It would be A because the factor is the denominator and it would be more units in size, so there are 60,000 inches in 5,000 feet.

f(x) = –x^2+ 6
Find f(-3)

Answers

So if f(-3), then x = -3.


Substitute.



y = -(-3)^2 + 6

= -(9) + 6

= -3


Hope it helped

Answer:

15

Step-by-step explanation:

3^2+6= 9+6= 15 hope it helped

Decrease 20g by 90% I don’t get this

Answers

Answer:

Step-by-step explanation:

If you wanna decrease the number 10 by 90%, It's just 9. You simply need to multiply a/100 at the number you try to decrease by a%.

Answer:

Decrease 20g by 90%: final value 2 gm

Step-by-step explanation:

decrease 90%: decrease 20 * 0.9 = 18

new value after decrease: 20 - 18 = 2

This is my last question can someone help? And make sure the answer is right?

Answers

Answer:

C, [tex]10[/tex]

Step-by-step explanation:

[tex]7x+10=8x[/tex]

subtract [tex]7x[/tex] form both sides

[tex]10 = x[/tex]

plz mark me brainliest. ;)

Find the degree of the monomial.
9xy3z7

Answers

The answer is 11 :)
Your answer is 11, let me know if its correct?

Maggie owes the candy store $20. Each of 4 friends will help her pay off her debt. How much will each friend pay?

Answer choices
$ -5
$ 8
$ 5
$ -8

Answers

Each friend will pay 5$
Answer; C ) $5 each

A turtle is 1.5 feet long. If there were 6 of these turtles standing in a line, what would the length of the line be in yards?

Answers

Answer:

3

Step-by-step explanation:

Answer:

6 x 1.5 = 9 => 0.25 yards

Step-by-step explanation:

6 in a line, means times 6. Times do unit converison to get 0.25 yd.

Pat volunteered to bake 80 biscuits for a family reunion breakfast. She plans to bake 8 biscuits in each pan. Which number sentence can be used to find p, the number of pans of biscuits that she will need to bake?

Answers

Answer: 10 pans

Step-by-step explanation:

Step 1:

If the number of biscuits needed= 80

Step 2:

And the number of biscuits on each pan= 8

Step 3:

Then the number of pans needed= 80 ÷ 8

Answer: 80 ÷ 8 = 10pans

what is the value of x ? round your answer to the nearest tenth .

Answers

Answer:

39 maybe i don't know

Step-by-step explanation:

What is the lead coefficient in the product of ( -2x -3)(4x + 5) *
-8
-2
4
-15
Will pick brainliest

Answers

Answer:

Step-by-step explanation:

(-2x-3)(4x+5) = -(2x+3)(4x+5) = -(8x^2+12x+10x+15) = -8x^2 - 22x - 15

Leading coefficient is -8

How many zeros are shown in this graph:

Picture of the graph down below.

Answers

Answer:

4

Step-by-step explanation:

the zeros are each time it touchs/crosses the x axis

Piz help me fast asap thx​

Answers

Answer:

y = 476^x

Step-by-step explanation:

y = 250(1.904)^×

y = 476^x

Hope this helps, thank you !!

Answer:

Loading. . .

Step-by-step explanation:

help me again please due today

Answers

Answer:

y-int. is -4 (red)

Step-by-step explanation:

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