THIS IS FOR MY TEST PLEASE HELP
solve this system by ELIMINATION. show ALL steps please.
3x+4y=24
x-8y= -20​

Answers

Answer 1
2(3x+4y) = 2(24)
6x+8y = 48
Add both the equations
6x + 8y = 48
+ x - 8y = -20
—————————
7x = 28
x = 28/7
x = 4

Plug in this value in the second equation

(4) - 8y = -20
-8y = -24
y = -24/-8
y = 3

Therefore:
x = 4
y = 3

Related Questions

Given the equation y= -3x + 2.5 . When y is 8.5 , what value of x makes the equation true?

Answers

Answer:

x = -2

Step-by-step explanation:

y = -3x + 2.5

if y = 8.5 then:

8.5 = -3x + 2.5

-3x = 6

x = -2

There are 21 students in your class. The teacher wants to send 5 students to the library each day. The teacher will choose the students to go to the library at random each day for the first four days from the list of students who have not already gone.

What is the probability you will be chosen to go on the first day? Enter your answer as a fraction in simplest form.

Answers

Answer:

5C1/21C5

Step-by-step explanation:

What is the rate of function?

Answers

Answer:

3

Step-by-step explanation:

The rate of change (the y values) is going up 3, for every one it goes across.

please help me :( I need help

Answers

Answer:

Step-by-step explanation:

Lines l and m are the parallel lines and 't' is a transversal line,

Therefore, ∠1 ≅ ∠5 [Corresponding angle postulate]

∠5 ≅ ∠7 [Vertical angles theorem]

∠1 ≅ ∠7 [Transitive property]

Therefore, ∠1 ≅ ∠7 [Alternate exterior angles theorem]

7x+21 simplify the expression

Answers

Answer:

11x

Step-by-step explanation:

Answer:

1X+3

Step-by-step explanation:

This is the expression but simplified hope this helped u have a blessed day

Trigonometric Ratios
Find cos Z

Answers

Answer:

C

Step-by-step explanation:

cos Z = [tex]\frac{adjacent}{hypotenuse}[/tex] = [tex]\frac{YZ}{XZ}[/tex] = [tex]\frac{24}{30}[/tex]

Will mark brainliest and give ten points

Answers

Answer:

A. 8/3

B. $8.00

Step-by-step explanation:

A. 10 2/3 divided by 4 is 8/3

B. 8/3 x 3 = 8

3. Which of the following will NOT produce a triangle?

A. angle measures of 339, 679, and 80°

B. side lengths of 5 inches, 5 inches, and 9 inches

C. angle measures of 90°, 60°, 30°

D. side lengths of 4 inches, 8 inches, and 12 inches

Answers

i think it is B .... i dont know

Consider these functions: f(x) = 3x3 + 8x − 2 k(x) = 4x What is the value of k(f(x))? A. 192x3 + 8x − 2 B. 192x3 + 32x − 2 C. 12x3 + 32x − 2 D. 12x3 + 32x − 8

Answers

Answer:

D. 13x3+32x-8

I hope this help

The value of k(f(x)) is 12x³+32x-8. Therefore, option D is the correct answer.

The given functions are f(x)=3x³+8x-2 and k(x)=4x.

We need to find the value of k(f(x)).

What is the function?

In mathematics, a function from a set X to a set Y assigns to each element of X exactly one element of Y. The set X is called the domain of the function and the set Y is called the codomain of the function.

Now, k(f(x))=4(3x³+8x-2)=12x³+32x-8

Therefore, option D is the correct answer.

To learn more about the functions visit:

https://brainly.com/question/9046022.

#SPJ5

Answer? Appreciate the help

Answers

Answer y = -2

Step 1.

In order to make an equation with 1 variable, substitute the right side of the first equation for x in the second equation for 3x + 5y = 20. In the example all instances of x in the second equation will be replaced by 10.

Rewrite the x so it will be 3 · 10.

3 · 10 + 5y = 20

Step 2.

Multiply 3 by 10.

3 × 10 = 30

Step 3.

Subtract 30 from both sides.

30 + 5y - 30 = 20 - 30

Step 4.

Simplify.

5y = -10

Step 5.

Divide both sides by 5.

1. Divide the numbers.

5 ÷ 5 = 1

= y

2. Simplify. [tex]\frac{-10}{5}[/tex]

Apply the fraction rule. [tex]\frac{-x}{y} =-\frac{x}{y}[/tex]

[tex]-\frac{10}{5}[/tex]

3. Divide.

10 ÷ 5 = 2

Y = -2

A car is traveling at a speed of 30 miles per hour. What is the car's speed in kilometers per hour? How many kilometers will the car travel in 3 hours? In your
computations, assume that I mile is equal to 1.6 kilometers. Do not round your answers.

Answers

Answer:

144.84

Step-by-step explanation:

In ΔSTU, the measure of ∠U=90°, TS = 65, UT = 56, and SU = 33. What ratio represents the cosine of ∠S?

Answers

Answer:

33/65

Step-by-step explanation:

Given the following

∠U=90°,

TS = 65 = HYpotenuse

UT = 56 = Opposite

SU = 33 = Adjacent

Cos <S = adj/hyp

Cos <S = SU/TS

Cos <S = 33/65

Hence the required ratio is 33/65

i just need the last one please

Answers

Answer:

7

Step-by-step explanation:

Answer:

I think its 10, from the mid point 41 then going to upper quarter and lower which is 27 and 37 so it means -10

In a class of 28 students, 19 have a cat and 6 have a dog. There are 5 students who do not have a cat or a dog. What is the probability that a student who has a cat also has a dog?

Answers

Answer:

19/28juice wrld is not gone he is sippn juice in a better wrld

25/28 would be your answer

Delfina’s graduation picnic costs$35 for every attendee. Write an equation that shows the relationship between the attendees (a) and the cost (c)

Answers

Answer:

your answer will be C=35a

Step-by-step explanation:

hope this helps u have a great day

4. There are 18 000 seats in Rogers Arena in Vancouver. At a sold-out Canucks game, there are 5 Canucks fans for every Flames fan.
a. What is the ratio of Canucks fans to Flames fans?
b. What is the ratio of Flames fans to total fans?
c. How many Canucks fans are in attendance?

Answers

Answer: 5:1, 1:6, 15,000.

Step-by-step explanation:

a. logic

b.5+1

c. 18000 divided by 6 is 3000 so you subtract 3000 from the total which is 18000.

HELP ME
Find the volume of this pyramid, its a triangular pyramid.​

Answers

Answer:

240inscubed

Step-by-step explanation:

10x8÷2=40

=40×6

=240in3

Quadrilateral BCDE is inscribed in circle A. The measure of ⏜ is 73°. The measure of ⏜ is 53° and the measure of ⏜ is 102°.


Determine the measure of ∠ BCD.

Answers

Answer:

117

Step-by-step explanation:

Angle BCD intercepted arc is Arc DEB.

We know DE measure but we need to find EB measure.

Since a circle circumference add up to 360, we can add all of the known arcs up to 360 to find the missing arc.

[tex]73 + 53 + 102 + x = 360[/tex]

[tex]126 + 102 + x = 360[/tex]

[tex]228 + x = 360[/tex]

[tex]x = 132[/tex]

So arc EB measure 132.

Arc eb and de.

132+102=234.

Angle BCD is inscribed angle of Arc DEB, so that means angle BCD is half of Arc DEB.

[tex] \frac{234}{2} = 117[/tex]

A stadium has seating accommodation for 3800 people. At a cricket match all seats were taken. If there were 5609 people attending the match, how many people didn't have seats?​

Answers

Answer:

Step-by-step explanation:

Those standing is the same thing as people who didn't have seats.

Those standing = the total number of people attending - those seated.

Those standing = 5609 - 3800

Those standing = 1809

What is the distance between the points (7, 8) and (-8, 0) on a coordinate grid?

Answers

Answer:

17

Step-by-step explanation:

Answer:

17

Step-by-step explanation:

i got it right on edge 2021

15,909 rounded to the nearest ten thousand

Answers

Answer:

Step-by-step explanation:

15909

16010

Answer:

20,000 i think :))

Step-by-step explanation:

I HOPE THIS HELPS YOU OUT WITH YOUR QUESTION! PLZ LET ME KNOW IF IT DID! IT MAKES ME FEEL GOOD THAT SOMEONE APPRECIATES IT! ANYWAY, IF YOU HAVE A FEW MINUTES PLZ GOT TO MY PROFILE AND THANK MY ANSWERS (THE MORE THE MERRIER)

What is the solution to the inequality shown?
2(x + 3) < 6 - x

Answers

Answer:

x = 0

Step-by-step explanation:

Step 1: Simplify both sides of the inequality.

2x+6<−x+6

Step 2: Add x to both sides.

2x+6+x<−x+6+x

3x+6<6

Step 3: Subtract 6 from both sides.

3x+6−6<6−6

3x<0

Step 4: Divide both sides by 3.

3/3 < 0 /3

x = 0

Need help please?!???!!!!

Answers

Answer:

573.66

Step-by-step explanation:

For this question, all you have to do is multiply 788 and 0.728 together to find how much 72.8% of 788 is. And after multiplying them together, the result you get is around 573.66.

Answer:

573.7

Step-by-step explanation:

788 * .728= 573.664

Identify the vertex of the parabola and tell whether it is a minimum or a maximum.

Answers

Answer:

First parabola's vertex is (-2,2), which is a minimum.

Second parabola's vertex is (3,2), which is a maximum.

Step-by-step explanation:

Simply, a vertex of a quadratic is a graph's turning point.

The maximum and minimum can be identified by seeing if the graph curves up or down.

Maximum occurs when your graph is facing down.

Minimum occurs when your graph is facing up.

Please help me on this question

Answers

The Answer is 240 yes

Each piece of candy costs $0.45. If you have $9 to spend on candy how many pieces can you buy?

Answers

Answer:20 pieces

Step-by-step explanation:You have $9 and each(each means to divide) piece of candy costs $0.45

So you have to divide:

$9÷0.45

=20 pieces

what is the slope of the line that passes through the points ( -2, -1) and (3, 5)

1. 5/6
2.6/5
3.-5/6
4.-6/5
Someone help please

Answers

The answer is 4 because the -2 -1 connect with 3 5
Helloo
The answer should be 1. 5/6

Explanation:
the formula for finding the slope is x2 - x1 over y2 - y1

3 - (-2) = 5
5 - (-1) = 6

Hope this helps! :)
btw could I get brainliest I need help ranking up :)

43% of what number is 65

Answers

Answer:

I believe the answer will be around 28

Step-by-step explanation:

Hope this Helped

I NEED HELP> ASAP PLEASEEEE

Answers

first one is (5,6). second one is (-5,-6).

what's 2 plus 2 i need help please:(

Answers

Answer:

i think its 4......i dont know......probably 5

Step-by-step explanation:

it is 4

Other Questions
Given m = -1/2 and the point (2, 1), which of the following is the point-slope form of the equation? FechaNombreClaseLevel 1 pp. 277-281Gramtica C Irregular VerbsLocolon 2UNIDADGoal: Use dar, decir, poner, salir, traer, and venir to talk aboutpreparations for a party-0 ngel and Ana are invited to a party at my house. Complete each sentences with theappropriate form of the vero1. ngela las 3:00p.m (venir)2. Yo nuncaun secreto. (decir)3. ngel y Anaun postre muy rico. (traer)4. Ana me ayuda yla mesa (poner)5. T tambina mi fiesta? (venir)entheses to complete What is the center of the circle with this equation is (x+2)+(y-4)=41? Quadrilateral BCDE is inscribed in circle A. The measure of is 73. The measure of is 53 and the measure of is 102.Determine the measure of BCD. Match the following Items.1. consternation2. deferencea part of something such as aperson's personality or certain objectsnecessary to achieve a means toan end regardless of its ethical valuethe feeling of helplessness,bewilderment, or fearthe act of putting the needs of3.divisive4. embargoothers first5. expedienta person or situation that causeshostility within a groupthe act of refusing to trade goodswith another nation6. facet 4. There are 18 000 seats in Rogers Arena in Vancouver. At a sold-out Canucks game, there are 5 Canucks fans for every Flames fan.a. What is the ratio of Canucks fans to Flames fans?b. What is the ratio of Flames fans to total fans?c. How many Canucks fans are in attendance? Delfinas graduation picnic costs$35 for every attendee. Write an equation that shows the relationship between the attendees (a) and the cost (c) please help me :( I need help i just need the last one please PLSSS NEED HELPI WILL MARK BRSINLIESTPLSSSS Describe what OP Art is in your own words? Before the clowns arrived, only 35 percent of the childrenwore happy faces. If 91 children did not wear happyfaces, how many children were there in all? 4 km4 km4 km4 km7 km4 km4 km What is plotted on the Y axisSpeedDistance or time why might conflict arise between france and england what's 2 plus 2 i need help please:( Answer? Appreciate the help WILL MARK BRAINLENESTWich Europen ruler was able to bring all of the areas in blue under his direct control?A) Adolf HitlerB) Julius CaesarC) Kaiser Wilhelm IID) Napoleon Bonaparte if you traveled 45,000 meters at a velocity of 4.5 m/s how many hours would it takeShow an explanation On a horizontal number line, -43 is located to the left of -35.