1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Anvisha [2.4K]
4 years ago
10

Please help me with this problem:)

Mathematics
2 answers:
krok68 [10]4 years ago
5 0

Answer:

(2,1)

Step-by-step explanation:

3x+y = 7

-2x +y = -3

Solve the second equation for y by adding 2x to each side

-2x+2x +y = -3+2x

y = -3 +2x

Substitute into the first equation

3x+ (-3+2x) = 7

Combine like terms

5x -3 = 7

Add 3 to each side

5x-3+3 = 7+3

5x = 10

Divide by 5

5x/5 = 10/5

x=2

Now we need to solve for y

y = -3 +2x

y = -3 +2(2)

y = -3+4

y =1

motikmotik4 years ago
5 0

Step-by-step explanation:

3x + y = 7 \:  \:  \:  \:  \:  \: ...(1) \\  - 2x + y =  - 3 \:  \:  \:  \:  \:  \:  \: ...(2)

From (1) we get,

x =  \frac{7 - y}{3}  \\

put the value of x in equation 2

- 2( \frac{7-y}{3} ) + y =  - 3 \\  \\  -  \frac{14 -2y}{3}  + y =  - 3 \\  \\   \frac{ - 14 -2y+ 3y}{3}  =  - 3 \\  \\  y - 14 =  - 9 \\ y =  + 14 - 9 \\  y =  5

Now,

put the value of y in equation (1)

3x + ( - 23) = 7 \\ 3x - 23 = 7 \\ 3x = 7 + 23 \\ 3x = 30 \\  \\ x =  \frac{30}{3}  \\  \\ x = 10

You might be interested in
Angle between 0 and 360 coterminal to 444 degrees
ycow [4]

Answer:

444 is coterminal to 84

Step-by-step explanation:

Just subtract 360 from 444 and you have your answer

444 - 360 = 84

4 0
2 years ago
Find the Domain: Show all steps <br><br> h(x)=2(x+5)^2-5
kobusy [5.1K]

Answer:

The domain is all real numbers (see the explanation)

Step-by-step explanation:

we have

h(x)=2(x+5)^2-5

This is a vertical parabola open upward (the leading coefficient is positive)

The vertex represent a minimum

The vertex is the point (-5,-5)

we know that

The domain of a function is the set of all possible values of x

The range of a function is the complete set of all possible resulting values of y, after we have substituted the domain.

In this problem

The domain is the interval (-∞,∞)

The domain is all real numbers

The range is the interval [-5,∞)

All real numbers greater than or equal to -5

3 0
3 years ago
A desk is purchased for $277. Calculate its worth after depreciating for 5 years if it’s depreciation rate is 20% per year.
Over [174]
20% x 5 = 100%
Depreciation means decreased of a value
8 0
4 years ago
WILL MARK BRAINLIEST + 50 POINTS
iren [92.7K]

Answer:

The dimensions are 25 * 50 feet.

Step-by-step explanation:

The 3 sides of the pen will measure (2x + y)  feet where x is the width and y is the length.

2x + y = 100

y = 100 - 2x

The area A  = xy =  x(100 - 2x) ft^2.

Finding the maximum area.

A = x(100 - 2x)

A = 100x - 2x^2     Finding the derivative:

A' = 100 - 4x

For maximum value of A this equals zero:

100 - 4x = 0

4x = 100

x = 25 ft,  so this is the width.

The length is  100  - 2(25) =  50 ft.

8 0
3 years ago
1. (SLO) Simplify the expression: 6(b-7)
Sav [38]

1 → B

multiply each term in the parenthesis by the 6 outside

6(b-7) = 6b - 42

2 → D

multiply each term in the parenthesis by the 3 outside

3(4x+6y+2) = 12x+18y+6

3 → A

the value outside the parenthesis is -1, hence each term inside is multiplied by -1

-1(6x+5y) = -6x -5y


3 0
4 years ago
Read 2 more answers
Other questions:
  • Hank bought 2.4 pounds of apples. Each pound cost $1.89. How much did hank spend on the apples?
    5·2 answers
  • If y varies inversely as x and y = 32 when x = 42, find y when x = 24.
    6·1 answer
  • What is one plus one
    9·2 answers
  • A deli sells meat and cheese by the pound. The expression 7.99m + 5.99c represents the total cost of m pounds of mest and c poun
    5·2 answers
  • the cube below is divided into 8 equal cubes and broken apart. what is the total surface area of all 8 cubes
    15·1 answer
  • Which pair of angles must be supplementary? 50 POINTS!!! 2 lines intersect to form right angles. Another line goes through the l
    9·2 answers
  • A bag contains the letters of the alphabet. What is the probability of choosing a vowel from the bag? (a, e, i, o and u )
    7·1 answer
  • E
    13·1 answer
  • PLEASE HELP!!!<br> WILL MARK BRAINLIEST!!!
    15·1 answer
  • A byclist was going from point A to point B at a speed of 12km per hour. On the way back he increased his speed by 18km and cove
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!