Mathematics High School

someone help me with this ples with steps

Answers

Answer 1

Answer:

[tex]x=\frac{21}{4}[/tex]

[tex]y=\frac{21}{2}[/tex]

Step-by-step explanation:

equation (1): [tex]\frac{1}{2} (2x+y)=\frac{21}{2}[/tex]

equation (2): y=2x

solve the system by substitution

step1: sub (2x) for y in equation 1:

[tex]\frac{1}{2} (2x+y)=\frac{21}{2}[/tex]

[tex]\frac{1}{2} (2x+2x)=\frac{21}{2}[/tex]

step2: simplify the expression:

[tex]\frac{1}{2} (4x)=\frac{21}{2}[/tex]

[tex]2x=\frac{21}{2}[/tex]

(divide by 2 for both sides)

[tex]x=\frac{21}{4}[/tex]

To find the value for y sub 21/4 for x in equation 2:

y=2x

y=2×(21/4)

[tex]y=\frac{21}{2}[/tex]

Related Questions

Mary spent a total of $291.30 for a party she spent $200.37 on food plus an additional $30.31 for each hour of the party how long was the party

Answers

3 hours

Step-by-step explanation:

total money = $291.30food money = $200.37party money = total money - food money = $291.30 - $200.37 = $90.93party money each hour = $30.31party hour = $90.93 ÷ $30.31 = 3hours

MARK ME BRAINLISTPLZ FOLLOW ME

The party was 3 hours long

30.31(1 hour ) + 30.31(2 hour) + 30.31(3hour =90.93+ 200.37(food)=291.30

w + 15 = 29
w=___ ?? HELP

Answers

Answer:

w=14

Step-by-step explanation:

29-15=14

Answer:

Step-by-step explanation:

29-15 =14.

The answer is 14

Someone help me I don’t understand !

Answers

Answer:

2. -8x - 6

3. 4.5x + 10 (I think, not quite sure)

4. 0.25 - 5x (I think, also not quite sure)

5. -8x - 5y + 5.5

Step-by-step explanation:

2. Distribute the -2 to all terms except -1.

-2(4x + 2.5) - 1

-8x - 5 -1

-8x - 6

5. Combine 6x and -14x (6 - 14 = -8).

6x - 5y - 14x + 5.5

-8x - 5y + 5.5

What is this plz help

Answers

it’s weird. that’s what it is

Parallelogram:
A = bh
A = 12(6)
A = 72cm^2

Triangle:
A = 1/2bh
A = 1/2(12)(4)
A = 24cm^2

Total Area of Composite Figure:
72cm + 24cm = 96cm^2

Kayla drives 15 miles in 20 minutes. If she drove one hour in total at the same rate,
how far did she go?

Answers

Answer:

45 miles

Step-by-step explanation:

first divide miles/minutes: 15 / 20 = 0.75

then multiply: 0.75 x 60 = 45

write 12 as a product of its prime factors

Answers

Answer:

the Prime Factors of 12 are: 2, 2, 3.

Step-by-step explanation:

Therefore 12 = 2 X 2 X 3.

Describe and correct the error shown to the right that a student made when writing a recursive formula from an explicit formula. Picture below shows the explicit formula and the incorrect recursive formula.

Answers

Just kidding.

now help me for 100 points.

14 (multiplied) or (divided) by what gives me -11.2

Answers

Answer:

-0.8

Step-by-step explanation:

firstly do

-11.8 ÷ 14 which will give you -0.8

14 × -11.8 = -0.8

How do I simplify fractions ?

Answers

Write down the factors for the numerator and the denominator.

Determine the largest factor that is common between the two.

Divide the numerator and denominator by the greatest common factor.

Write down the reduced fraction.

Answers

Answer:

x=1/3

y=-7

Step-by-step explanation:

using the elimination method, you can add both equations vertically, to eliminate the x

-3x+y=-8

3x+2y=-13

3y=-21

y=-7

we then fix the value of y into the first equation

-3x+y=-8

-3x-7=-8

-3x=-8+7

-3x=-1

x=1/3

Write an equation to represent 'twice a number (x) is fifty"

Answers

Answer:

2x=50

Step-by-step explanation:

Hi there,

Your question is "twice a number (x) is fifty"

Recall how a number is represented by x.

Twice a number would be represented as 2x.

Therefore, to represent that twice a number is equal to 50, that would result in the expression: [tex]2x=50[/tex]

If you're looking to solve this equation, it's often best to think about the "reverse" of the current equation.

Notice how 2 is multiplying the x.

To isolate x, divide that side by 2.

However, recall that whatever is done to one side of an equation must also be done to the other side of the equation. Therefore, you will need to divide both sides by 2.

[tex]2x=50[/tex]

[tex]\frac{2x}{2} = \frac{50}{2}[/tex]

[tex]x=25[/tex]

Equation: [tex]2x=50[/tex]

Solving for x: 25

Hope that helps!

How do you solve this equation? 3x^2 + x - 6 *
x = -3, 2
x = 3,-2
x = 1, 2
y = 1, 2

Answers

Answer:

that not a thing

Step-by-step explanation:

Need help on Number 6

Answers

Answer:

area of triangle=1/2 (base×height)=1/2 (7×11)=38.5cm²

Li tried to evaluate an expression step by step. Find Li's mistake. What is the mistake he made. Is it A:step 1, B:step 2, C:step 3 or D: Li did not make a mistake ???

Answers

Answer: C Step 3

Step-by-step explanation: I passed

geometric mean between 1/2 and 2

Answers

Answer:

yeah that's right

Step-by-step explanation:

Write an equation for the nth term of the geometric sequence 5,30,180,1080

Answers

Answer: [tex]a_{n}[/tex]=5*[tex]6^{n-1}[/tex]

Step-by-step explanation:

Find the measure of angle TUY

Answers

Answer:

120

Step-by-step explanation

Exterior angle theorem:

d = a + b

d = 70 + 50

d = 120

Answer: TUY: 120°

Step-by-step explanation:

Hello,

1. Recall that the sum of a triangle’s angles is 180°, regardless of the type of triangle.

2. Find TUS, that is, the angle for U.

U = 180°-(50°+70°)=60°

For TUY:

Knowing that U=60° and that the line above U is 180°:

180°-60°=120°

A figure has an area of 64 square units. Which describes the area of the figure after a dilation with a scale factor of 3/2?
A)96 square units
B)144 square units
C)112 square units
D)32 square units

Answers

I think your answer would be a)96 square units

Create different examples of triangles.
2C is represented by the purple section on line p.
When m_C increases, what happens to the middle
section on line p?
When muC decreases, what happens to the middle
section on line p?

Answers

Answer:

It also increases

It also decreases

Step-by-step explanation:

I DID it

Answer:

It also increases

It also decreases

Step-by-step explanation:

HELP PLEASE is this right

Answers

Answer:

YES!!!

Step-by-step explanation:

Find the value of the expression 12y - 2xy, when x = 5 and y = 10.

Answers

Answer: 20

12y - 2xy

Insert values into equation

12(10) - 2(5)(10)

120 - 2(50)

120 - 100

20

Answer:

12y-2xy

x=5, y=10

(12x10) -(2x5x10)

=120-100

=20

Step-by-step explanation:

1.first collect the information you have been given in the question to make answering of the question easy.

2.then substitute the x value (in this case 5) and the y value (10) into the expression 12y - 2xy on there respectful positions.

3.having done so, you can then multiply and thereafter subtract as the question requires you to do.

Note: only substitute the y and x values where y and x appear in the question.

Always start with multiplying, after substituting,before subtracting or adding.

Function f is defined by the equation f(x) = x2 1. What is f(2) ?

Answers

Answer:

Step-by-step explanation:

So you basically replace the x with 2. So f(x) = x21, then it would change to f(2) = 2(21). Then you would just multiply 21 by 2 and you would get 42.

Hope this helps!

Answer:

f=x21=x2f(2)=4

Step-by-step explanation:

Evaluate f(x) = 6x + 7 at the given value.
f(-2)=?

Answers

Answer:

f(-2)=6×-2+7=-12+7=-5

Write the linear equation in slope-intercept form:
(-4 6); slope=-3/4

Answers

Answer:

Step-by-step explanation:

y-6 = -¾(x+4)

y-6 = -¾x -3

y = -¾x + 3

Pleaseee helppp answer correctly !!!!!!!!!!!!!!! Will mark Brianliest !!!!!!!!!!!!!!!!!!!!!!!!

Answers

Answer:

2t+2u+2v+4w

Step-by-step explanation:

Add up all of the terms

Write the equation of the graph in factored form. remember to include the y or f(x)

Answers

Answer:

y=(x+2)(x+7)

Step-by-step explanation:

5. The table below represents a quadratic function: draw a graph plot points

What would be the axis of symmetry for the equation?
What is the vertex?
What are the roots?
What is the y-intercept?

Answers

Answer:

The extreme point ( maximum or minimum ) of a parabola is called the vertex, and the axis of symmetry is a vertical line that passes through the vertex. The x-intercepts are the points at which the parabola crosses the x-axis. If they exist, the x-intercepts represent the zeros, or roots, of the quadratic function.

Step-by-step explanation:

The axis of symmetry of a parabola is a vertical line that divides the parabola into two congruent halves. The axis of symmetry always passes through the vertex of the parabola . The x -coordinate of the vertex is the equation of the axis of symmetry of the parabola.

PLSSS I SHOULD KNOW HOW TO DO THIS BUT I DON'T so uh can someone help T-T

Answers

Answer:

dude, this is like middle school stuff, you can do this

Step-by-step explanation:

Suppose that a piano costs $5,000 and loses 20% of its value each year. What will be the value of the piano after 16 years? A. $219.90 B. $274.88 C. $140.74 D. $175.92

Answers

The answer is c 140.74 bucks or pound

Based on the information given will be the value of the piano after 16 years is : C. $140.74.

Using this formula

Time=Principal(1-rate)^n

Where:

Principal=$5,000

Rate=20%

Number of year=16 years

Let plug in the formula

Time=5,000(1-0.20)^16

Time=5,000(.80)^16

Time=$140.737

Time= $140.74 (Approximately)

Inconclusion the value of the piano after 16 years is : C. $140.74.

Learn more here: https://brainly.com/question/23565

3. Sandi is making curtains for her bedroom. She needs 58 feet of fabric. She has 14 yards of fabric. How many more yards of fabric does she need?

Answers

Answer:

she needs 3 1/3 more yards

Step-by-step explanation:

There are 3 feet in a yard

14yards x 3feet = 42 feet

58 feet- 42 feet= 10 feet

10 divded by 3 is about 3.3

Answer: 6 yards

Step-by-step explanation:

1) 14 x 3 = 42

2) 58 - 42 = 16

3) 16 / 3 = 5.33333333....

4) round up = 6

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