All categories

2 years ago

Help me please with math

Mathematics

2 answers:

koban [17]2 years ago

7 0

Answer:

2) y = x - 4

y = -x + 2

=> x - 4 = -x + 2

=> 2x = -6

=> x = -3

=> y = -3 - 4 = -7

3) y = 3x + 1

y = 5x - 3

=> 3x + 1 = 5x - 3

=> 2x = 4

=> x = 2

=> y = 3(2) + 1 = 7

4) 2x + y = 8 => y = -2x + 8

y = x - 7

=> -2x + 8 = x - 7

=> 3x = 15

=> x = 5

=> y = 5 - 7 = -2

Hatshy [7]2 years ago

5 0

Answer:

given below ↓

Explanation:

y = x - 4

y = -x + 2

as they are equal:

-x + 2 = x - 4

-x - x = -4 - 2

-2x = -6

x = 3

y = -x + 2

y = -3 + 2

y = -1

solutions: (3,-1)

y = 3x + 1

y = 5x - 3

as y are equal:

5x - 3 = 3x + 1

5x - 3x = 1 + 3

2x = 4

x = 2

y = 3x + 1

y = 3(2) + 1

y = 6 + 1

y = 7

solutions: (2,7)

2x + y = 8

y = x - 7

insert equation x - 7 in replace of y in equation 1

2x + x - 7 = 8

3x - 7 = 8

3x = 15

x = 5

y = x - 7

y = 5 - 7

y = -2

solution's: (5,-2)

You might be interested in

There are three monomials such that the greatest common factor of the first and second monomials is 2xy, and the greatest common

AlekseyPX

let: m1 = 2xy a m2 = 2xy b m3 = 2x2y c since 2 and 3 have a common factor let b=2n m1 = 2xy a m2 = 2xy 2 n m3 = 2x2y c or simply m1 = 2xy a m2 = 2xy 2n m3 = 2xy 2c given that anc have no common factors

6 0

3 years ago

It has been estimated that the population of Indianapolis is growing at a rate of 0.9% per year. Assuming that population growth

Mumz [18]

Answer:

2,136,605

Step-by-step explanation:

To estimate growth, we use the formula shown below:

$F=P(1+r)^t$

Where

F is the future amount (we want to find for Jan 2024)

P is the present amount (present population of 1,988,817)

r is the rate of growth (0.9% means 0.009)

t is the time in years (from Jan 2016 to Jan 2024 is 8 years, t = 8)

Let's put these into the formula and figure out F:

$F=P(1+r)^t\\F=1,988,817(1+0.009)^8\\F=2,136,604.5$

Rounding we get the population in Jan 2024 to be 2,136,605

3 0

3 years ago

Starting at 7:00 a.m., Lin spent a day hiking through a canyon. This graph shows her elevation (in meters) at some different tim

ollegr [7]

Answer:

Sorry for my bad handwriting it's hard write in a computer

Step-by-step explanation:

5 0

2 years ago

In right triangle ABC, ZC is a right angle, m ZA = 52, AC = 10.01, and AB = c.

nlexa [21]

Answer:

The measurement of AB is 16.25 units.

Step-by-step explanation:

In right triangle ABC, ∠C is a right angle, m∠A = 52° , AC = 10.01, and AB = c.

We need to find the measurement of AB.

∠C is a right angle, it means AB is hypotenuse.

In a right angle triangle,

$\cos \theta=\dfrac{Base}{Hypotenuse}$

$\cos A=\dfrac{AC}{AB}$

$\cos (52^\circ)=\dfrac{10.01}{c}$

$0.616=\dfrac{10.01}{c}$

$c=\dfrac{10.01}{0.616}$

$c=16.25$

Hence, the measurement of AB is 16.25 units.

6 0

2 years ago

What’s 1 + 1 and why?

MrRa [10]

Answer:

Step-by-step explanation:

you add 1 to 1 and that gives you 2

8 0

3 years ago

Read 2 more answers