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
Julli [10]
3 years ago
11

Help. I am trying to solve these questions in math called ‘Two Step Equations’. I need answers

Mathematics
2 answers:
Aleks04 [339]3 years ago
8 0
1. x = -7
2. y = -1

For number 1:

Plus five both side of the equation and you get -3x = 21

Divide -3 both side and you get x = -7

For number 2:

Multiply -4 by y and -2 .... you get -4y + 8 = 12

Minus 8 side of the equation and you get -4y = 4

Divide by -4 both sides and you get y = -1
saveliy_v [14]3 years ago
4 0

Answer:

1. x= -7

2. y= -3.5

Step-by-step explanation:

You might be interested in
Solve the following system of equations using the substitution method.
Novay_Z [31]
X=2y
2x+5y=9

substitute the x=2y into the second equation
2(2y)+5y=9
multiple the 2y by 2. 4y+5y=9
combine like terms. 9y=9
divide the 9 out from both sides. y=1
plug the y back into the first equation
x=2(1)
multiply. x=2

your answer is: x=2
y=1
7 0
3 years ago
What is the axis of symmetry for the graph of y – 4x = 7 – x2
eimsori [14]

we know that

The equation in vertex form of a vertical parabola is equal to

y=a(x-h)^{2}+k

where

(h,k) is the vertex of the parabola

and the axis of symmetry is equal to the x-coordinate of the vertex

so

x=h -----> equation of the axis of symmetry

In this problem we have

y-4x=7-x^{2}

Convert to vertex form

Group terms that contain the same variable, and move the constant to the opposite side of the equation

y-7=-x^{2}+4x

y-7=-(x^{2}-4x)

Complete the square. Remember to balance the equation by adding the same constants to each side

y-7-4=-(x^{2}-4x+4)

y-11=-(x^{2}-4x+4)

Rewrite as perfect squares

y-11=-(x-2)^{2}  

y=-(x-2)^{2}+11  

the vertex is the point (2,11)

therefore

<u>the answer is</u>

The axis of symmetry is

x=2

see the attached figure to better understand the problem

5 0
4 years ago
Read 2 more answers
A contractor is in charge of hiring people for a construction project. The number of days it would take to complete the project
sweet-ann [11.9K]

Answer:

\text{Domain of x}=[1,\infty), x \in Z^+

Step-by-step explanation:

Given the function: f(x)=\dfrac{280}{x},$ where:

f(x) =number of days it would take to complete the project

x =number of full-time workers.

\text{When x=0, }f(x)=\dfrac{280}{0}=$Undetermined\\\text{When x=1, }f(x)=\dfrac{280}{1}=$280 days\\\text{When x=280, }f(x)=\dfrac{280}{280}=$1 day\\\text{When x=560, }f(x)=\dfrac{280}{560}=$0.5 days

The domain of a function is the complete set of possible values of the independent variable.

In this case, the independent variable is x, the number of full-time workers. We have shown that x cannot be zero as there must be at least a worker on ground.

Therefore, an appropriate domain of the function f(x) is the set of positive integers (from 1 to infinity).

\text{Domain of x}=[1,\infty), x \in Z^+

7 0
3 years ago
Use the Pythagorean Theorem to find the length of the missing side of the right triangle. Then find the value of each of the six
olganol [36]

Answer:

The length of the missing side can be calculated by the following steps;

Step-by-step explanation:

5 0
3 years ago
a piece of lumber leans against a wall. the top of this 40 foot piece of lumber touches a point on the wall that is 36 feet abov
nignag [31]
So first find the distance from the bottom of the lumber to the wood
40^2= 36^2+X^2
X=304^1/2. Or the sqaure root of 304

The you use the sin equation

Sin90*\40= sin(unknown angle)/304^1/2
Sinx(x) = ((304^1/2)xsin(90))/40
X=arcsin((304^1/2)xsin(90))/40
8 0
3 years ago
Other questions:
  • How do I do this I don't understand "11 inches long, 5 inches wide." Aren't those the same things?
    9·2 answers
  • If you feel a room is claustrophobic, would you enjoy being in it? Why?
    7·2 answers
  • Number 26 I’m so confused on which is it
    6·2 answers
  • - Complete this sentence. 12 = 4 * 3 means that<br> 12 is<br> times as many as 4.
    11·1 answer
  • In the triangle below, what is the tangent of 60?
    5·2 answers
  • what's the length of one leg of a right triangle if the length of the hypotenuse is 25 units and the length of the other leg is
    8·1 answer
  • Bob has a coin cup with four $1 tokens and two $5 tokens in it. He also has two $10 tokens and one $25 token in his pocket. He
    7·2 answers
  • Estimate 26 to the nearest tenth. Then locate 26 on a number line.
    11·1 answer
  • Please answer with a screenshot if possible 100 points
    10·2 answers
  • Determine the period.
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!