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3 years ago

HELP ASAP (best answer will get marked BRAINELEST) solve step-by-step for each Question

Mathematics

1 answer:

Alik [6]3 years ago

3 0

Answer:

( 3.5 , 2 )

Step-by-step explanation:

(a). Yes, she can, because 3y = 2x - 1

(b). 5( 3y ) + y = 32

16y = 32

y = 2

2x - 1 = 3( 2 )

2x = 7

x = 3.5

( 3.5 , 2 )

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Solve the system of equations. -4x+7y=20 y=3x+15

polet [3.4K]

Answer:

Solve by Substitution :

// Solve equation [2] for the variable y

[2] 5y = 15x - 4

[2] y = 3x - 4/5

// Plug this in for variable y in equation [1]

[1] 15x - 20•(3x-4/5) = 7

[1] -45x = -9

// Solve equation [1] for the variable x

[1] 45x = 9

[1] x = 1/5

// By now we know this much :

x = 1/5

y = 3x-4/5

// Use the x value to solve for y

y = 3(1/5)-4/5 = -1/5

Solution :

{x,y} = {1/5,-1/5}

4 0

3 years ago

Select all sets in which the number

strojnjashka [21]

Answer:

Step-by-step explanation:

a rational number can be expressed as fraction. well, that is what the number 8/9 is.

so, A is a correct option.

as such it is automatically also a member of the real numbers (which is a superset of rational numbers). so, E is a correct option.

all other options are wrong.

8/9 is not a natural number (1, 2, 3, 4, ...).

it is not a whole number (0, 1, 2, 3, 4, ...).

it is not an integer (... , -2, -1, 0, 1, 2, 3, ...).

and as it is a rational number, it is automatically not an irrational number.

7 0

3 years ago

Find the vertex, x intercept, and y intercept of the following equation: y=(x-3)^2+5

daser333 [38]

Answer:

The x-intercepts are: ( 3 + i√5, 0) and (3 - i√5, 0).

The y-intercept is (0,5).

The vertex is at (3, 5).

Step-by-step explanation:

The given equation y=(x-3)^2+5 has the general form y=(x-h)^2+k, whose vertex is at (h,k).

Thus, the vertex of y=(x-3)^2+5 is (3,5).

Find the x-intercepts by setting y=(x-3)^2+5 = 0 and solving for x. To do this, solve (x-3)^2+5 = 0 for x. Subtracting 5 from both sides, we get:

(x-3)^2 = -5. We want to solve this for x.

Taking the square root of both sides, we get:

x-3 = √-1 * √5. Then x = 3 + i√5 and x = 3 - i√5. The x-intercepts are:

( 3 + i√5, 0) and (3 - i√5, 0).

3 0

3 years ago

How do you do number twenty four in the picture?

Lyrx [107]

1 gallon= 4 quarts= 8 pints= 16 cups. There's 4 quarts in a gallon, 2 pints in a quart, and 2 cups in a pint

3 0

3 years ago

Are you supposed to set up the problem for like 4y-18+y+14=81

zavuch27 [327]

X = 15
y = 21

First, solve for x on the right side triangle by adding angles and equaling to 180.
Now since you know the x value, solve the middle angle for the left side triangle. Add all angle on left triangle and equal them to 180.

Check out the pic.

8 0

4 years ago