Answers
Answer:
The value of x of the solution to the system of equations
x = -8Hence, option (C) is true.
Step-by-step explanation:
Given the system of equations
[tex]\begin{bmatrix}x=2y-4\\ 7x+5y=-66\end{bmatrix}[/tex]
Arrange equation variables for elimination
[tex]\begin{bmatrix}x-2y=-4\\ 7x+5y=-66\end{bmatrix}[/tex]
[tex]\mathrm{Multiply\:}x-2y=-4\mathrm{\:by\:}7\:\mathrm{:}\:\quad \:7x-14y=-28[/tex]
[tex]\begin{bmatrix}7x-14y=-28\\ 7x+5y=-66\end{bmatrix}[/tex]
subtracting 7x-14y=-28 from 7x+5y=-66
[tex]7x+5y=-66[/tex]
[tex]-[/tex]
[tex]\underline{7x-14y=-28}[/tex]
[tex]19y=-38[/tex]
so the equations become
[tex]\begin{bmatrix}7x-14y=-28\\ 19y=-38\end{bmatrix}[/tex]
solve 19y = -38
[tex]19y=-38[/tex]
Divide both sides by 19
[tex]\frac{19y}{19}=\frac{-38}{19}[/tex]
[tex]y=-2[/tex]
[tex]\mathrm{For\:}7x-14y=-28\mathrm{\:plug\:in\:}y=-2[/tex]
[tex]7x-14\left(-2\right)=-28[/tex]
[tex]7x+28=-28[/tex]
[tex]7x=-56[/tex]
Divide both sides by 7
[tex]\frac{7x}{7}=\frac{-56}{7}[/tex]
[tex]x=-8[/tex]
Therefore, the value of x of the solution to the system of equations
x = -8Hence, option (C) is true.
Related Questions
How much of earth surface by land
Answers
Answer:
GOOD AFTERNOON
UR ANSWER IS ::
Step-by-step explanation:
2
510.1 milion km
Mass: 5.972 × 10^24 kg
Distance from Sun: 92.96 million mi
a giraffe is 7 feet tall how tall is the giraffe in yards?
Answers
Answer:
2.3 yards.
Step-by-step explanation:
Per ever 3 feet is 1 yard.
Following that idea, we have to divide 7 by 3.
[tex]7/3=2.333[/tex]
rounding to the nearest tenth:
A giraffe that is 7 feet tall is 2.3 yards tall.
Answer:
2.3
Step-by-step explanation:
This is quite simple; just find out how many feet are in 1 yard, then multiply it to yards.
Solve
Given: 7 feet giraffe
To find: 7 feet in yards
First, 1 foot = 0.3 yards
∴, 7 feet = 1/0.3 × 7/?
Multiply 0.3 and 7
7 × 0.3 = 2.3
Solve for X
17
47
34
13
Answers
Answer:
So 180-94 =86 so then it becomes 60°, 86°, and 2x so you would then add 60 and 86 together and get 146 and 180 - 146 is 34 then divide by two and you get 17 so x=17°
Step-by-step explanation:
Sorry if that’s confusing
Answer:
x = 17
Step-by-step explanation:
The exterior angle of a triangle is equal to the sum of the 2 opposite interior angles.
94° is an exterior angle of the triangle, thus
2x + 60 = 94 ( subtract 60 from both sides )
2x = 34 ( divide both sides by 2 )
x = 17
What's the slope of (0,5) and (4,2)
Answers
-3/4
Slope is -3/4
Remember slope is y2-y1/x2-x1
Which of the following is a rational number?
A
B
V60
С
6
D
49
Answers
Answer:
b
can i have brainliest
4 1/2 + 1 3/5 =
What is the sum in simplest form
Answers
Answer: 6 1/10
Step-by-step explanation: I don’t know the decimal form but I had this question so
Explain how to graph 5 2 on the number line. A number line going from 0 to 3. There are 2 equals spaces between each number. The number line contains 0, point A is one-half, 1, point B is 1 and one-half, point C is between point B and 2, 2, point D is 2 and one-half, 3.
Answers
Answer:
point D
Step-by-step explanation:
To graph 5/2 on the number line is to find its mixed number.5/2 is a improper fraction and and is equal to 2 and 1/2.So 5/2 is on point D.Because there are 2 whole groups in 5 and 1/2 that makes the mixed number.
Good luck on your test or problem
Answer:
To graph 5/2 on the number line is to find its mixed number.5/2 is a improper fraction and and is equal to 2 and 1/2.So 5/2 is on point D.Because there are 2 whole groups in 5 and 1/2 that makes the mixed number.
Step-by-step explanation
the person above me was right
Please solve this and show explanation! ty!
Answers
Answer: x=1 or x=−1
Step-by-step explanation: Step 1: Add 6 to both sides.
x2−6+6=−5+6
x2=1
Step 2: Take the square root.
x=±√1
BRAINLESS
Answer:
Step-by-step explanation:
a.) c = 9
To get a perfect square you must divide the bx or 6x in this situation then square it.
6/2 = 3
3^2 = 9
b.) (x - 1)(x - 5)
x^2 - 6x + 9 = -5 + 9
x^2 - 6x + 9 = 4
x^2 - 6x + 9 - 4 = 4 - 4
x^2 - 6x + 5 = 0
(x - 1)(x - 5)
x - 1 = 0
x = 1
x - 5 = 0
x = 5
Will give crown help
Answers
Answer:
slope=-2
Step-by-step explanation:
Slope = Rise over Run
Here the rise is -4 units and run is 2 units
Therefore,
-4/2 =-2
Hope this helps!
7th grade math help
Answers
Answer:
1/6
Step-by-step explanation:
Add all the toys together: 6 + 5 + 4 + 3 = 11 + 7 = 18
There's 18 toys in total, 3 out of 18 of the toys are teddy bears so it's 3/18 but u have to check if u can simplify it, which u can. 3/18 simplified is 1/6, we can't simplified it anymore so 1/6 is ur answer
Answer: Probability of teddy = 1/6
Step-by-step explanation:
6 + 5+ 4 + 3 = 18
Probability of teddy = ?
teddy = 3
3/18
to the lowest term - 1/6
On the number line, what is the value of B?
— click on the picture for number line —
Answers
Can I have the brain thing
Plz give me brainiest
plz help asap i need help fast asap i will mark you brainlist
Answers
Answer:
What do you need help with?
If 3 is multiplied by a fraction less than 1, which of these could be the product?
a) 2/2
b) 3
c) 10/2
b) 4
Answers
List 4 equivalent to 3/7
Answers
Step-by-step explanation:
[tex]\dfrac{3}{7}=\dfrac{3}{7}\cdot\dfrac{2}{2}=\dfrac{6}{14}\\\\\dfrac{3}{7}=\dfrac{3}{7}\cdot\dfrac{3}{3}=\dfrac{9}{21}\\\\\dfrac{3}{7}=\dfrac{3}{7}\cdot\dfrac{4}{4}=\dfrac{12}{28}\\\\\dfrac{3}{7}=\dfrac{3}{7}\cdot\dfrac{5}{5}=\dfrac{15}{35}\\\vdots\\\\\dfrac{3}{7}=\dfrac{3}{7}\cdot\dfrac{10}{10}=\dfrac{30}{70}\\\vdots\\\\\dfrac{3}{7}=\dfrac{3}{7}\cdot\dfrac{100}{100}=\dfrac{700}{300}\\\vdots[/tex]
Solve and describe the graph of the inequality: j + 16 ≥ -21
Answers
Answer:
j ≥ -37
Step-by-step explanation:
j + 16 ≥ -21
move constant to the right hand side and change its sign
j ≥ -21 - 16
calculate the difference (subtract)
j ≥ -37
The graph would be a closed circle on -37 with an arrow pointing to the right.
To solve and describe the graph.
What is inequality?A statement of an order relationship greater than, greater than or equal to, less than, or less than or equal to between two numbers or algebraic expressions. The quality of being unequal or uneven.
Given that:
The inequality is
j + 16 ≥ -21
Move constant to the right hand side and change its sign
j ≥ -21 - 16
calculate the difference (subtract) the constant term
j ≥ -37
So, the graph would be a closed circle on -37 with an arrow pointing to the right.
Learn more about inequality here:
https://brainly.com/question/19846294
#SPJ5
Solve for s.
12s=72
s = 17
s = 27
s = 3
s = 7
Answers
Answer: s = 6
Step-by-step explanation:
just simply divide both sides.
12s / 12 = 72 / 12
s = 6
6 x 10 = 60
6 x 2 = 12
60 + 12 = 72
50 POINTS!!! If you’re a frequent flyer who travels to many different airports, and you have a choice between SkyWest Airlines (OO) and Southwest Airlines (WN) for all your flights, which carrier should you choose if your primary concern is arriving on time?
Answers
Answer:
Southwest
Step-by-step explanation:
Southwest always has good timing.
Answer:
SouthWest airlines
Step-by-step explanation:
It is the best Airlines and will always arrive on time
Please help me fast
Answers
Answer:
5/4 do the 2 lines then add1 then u get the anwswr
Step-by-step explanation:
Which function is equivalent to f(x) = -4(x + 7) – 6?
Answers
Answer:
f(x) = - 4x - 34
Step-by-step explanation:
Given
f(x) = - 4(x + 7) - 6 ← distribute parenthesis
= - 4x - 28 - 6 ← collect like terms
= - 4x - 34
15PTS PLEASE HELP ASAP!!
(dont write random answers pls!)
Answers
Answer:
to find the answer, you need to find the measure of the angle on the other side of the 142. and since it's a straight line, those two angles measures are =to 180 (they're supplementary angles). so the measure of that angle is 38 degrees. to find the measure of the remaining angle, you subtract the angle measures you already know from 180 (because the sum of interior angles in a triangle is 180.) to, the answer is:
180-90-38= 52 degrees or A
1. Karen had 15 Snicker Bars. She gave 7 to her brother. What percent did
she give away?
Answers
Answer:
46%
Step-by-step explanation:
Have a wonderful day/night!
Answer:
46.666666666667%
Step-by-step explanation:
Thats the percent she gave away
Plzzzzzzzz help I don’t understand
Answers
Answer:
Slope formula: y2-y1/x2-x1
Step-by-step explanation:
8-6/9-6= 2/0
Answer:
Step-by-step explanation:
Alright we need to prove that both the triangles are similar so lets get started
The slope formula is:
Slope = Change in y / Change in x
m = Δy / Δx
[tex]m=\frac{y_2-y_1}{x_2-x_1} \\\\[/tex]
Where, m is the slope and [tex](x_1,y_1) , (x_2,y_2)\\[/tex] are any points on the line
In this graph we are given three points which are
(0 , 2) , ( 6 , 6) and (9 , 8)
So for our first triangle we use the 2 points (0 , 2) and (6 ,6) and calculate the slope,
[tex]m=\frac{y_2-y_1}{x_2-x_1}\\\\m=\frac{6-2}{6-0}\\\\m=4/6\\\\m=2/3\\[/tex]
So the slope turns out to be 2/3 , Now for our second triangle use the 2 points (6 , 6) and (9 , 8)
[tex]m=\frac{y_2-y_1}{x_2-x_1}\\\\m=\frac{8-6}{9-6}\\\\m=2/3\\[/tex]
So we can see the the slope's are equal that's the answer to your first part.
Second part
Yes they are similar due to the property of corresponding angles where angle x of the first triangle equals angle x for the second triangle and angle y for the first triangle equals angle y for the second triangle and both the triangles have 90° se they are similar because all three angles are similar. (AAA = angle angle angle property) I have attached a to make you understand it better.
What do you know about the following System of Equations?
y=3x + 4
y 3x + 9
The graph of the lines will have one come point of intersection
The graph of the lines will have no common point of intersection
The graph of the lines will have an infinite amount of points in common
The lines are the same
Answers
Answer:
graph have no common points of intersection
Step-by-step explanation:
since both slopes have a value of 3, the system of equations are two parallel lines.
parallel lines will never meet.
since the y intercepts (plug in 0 for x or look at the constant) are different, they are not the same line
Given that 9=110 8=70 an p is parallel to q did I fill this out right?
Answers
Answer:
yes i think so it looks quite accurate
Answer:
This does look like the right answer. I think you filled it out right
Step-by-step explanation:
A new car was tested for the average gas mileage that it would receive. The tester was able to drive 2,250 miles on 125 gallons of gas. What is the expected gas mileage in terms of miles per gallon
Answers
Answer:
18 miles per gallon
Step-by-step explanation:
We get this by taking 2,250 (the distance traveled) divided by 125 (the amount of gas used)
(ii) Use the quadratic formula to solve 4x2 +11x-300 = 0.
Show all your working and give your answers correct to 2 decimal
places.
... or x =
[4]
mm
Answers
x=-11+-sqrt (11^2-4(8)(-300)/16
x=-11+-sqrt (121+9600)/16
x=-11+-sqrt (9721)/16
x=-11+-98.6/16
x=5.48 or x=-6.85
What is the correct answer?
Answers
Answer:46
Step-by-step explanation:
Which is a qualitative graph?
Answers
Step-by-step explanation:
Qualitative graphs are graphs that are used to represent situations that do not necessarily have numerical values. Qualitative graphs represent the essential elements of a situation in a graphical form. For example, Graph A could represent a car that is accelerating at a constant rate.
Therefore, the "Second graph" is the qualitative graph.
Learn more:
brainly.com/question/17146063
120 pupils went on a feildtrip . 55% of the pupils were girls and the rest were boys. How many boys went on the trip?
Answers
Answer:
54 boys went in the trip
Step-by-step explanation:
55% of 120 is 66 and 66 minus 120 is 55
Answer:
number of boys are 54. ...
someone please help me
Answers
Answer:
D. 8/5 x
Step-by-step explanation:
Answer:
8/5 x
Step-by-step explanation: