Mathematics College

Solve the system of equations ​

Solve The System Of Equations

Answers

Answer 1

Answer:

x = -2 and y = -21

Step-by-step explanation:

Given equations are :

[tex]y=15x+9\ .....(1)\\\\y=\dfrac{x}{2}-20\ ....(2)[/tex]

From equation (1) and (2)

[tex]15x+9=\dfrac{x}{2}-20\\\\15x-\dfrac{x}{2}=-20-9\\\\\dfrac{29x}{2}=-29\\\\x=-2[/tex]

Put the value of x in equation (1)

y = 15(-2) + 9

= -30 + 9

y = -21

So, the solution of the equations are (-2,-21).

Related Questions

These triangles are congruent by the triangle HELP FAST

Answers

Answer:

B. SAS

Step-by-step explanation:

Two sides of one triangle are congruent to two corresponding sides of the other triangle as shown in the figure.

The included angles are vertical angles, so they are congruent.

Answer: SAS

HELP ME BABES!!!
Use the equation below to find P, (P=a+b+c)
if =a13, =b17, and =c7

Answers

Answer:

P = 37 lmk if u want me to explain how ;=;

Step-by-step explanation:

the 30% discount on a $49 dollhouse​

Answers

Answer:

$34.3

Step-by-step explanation:

0.3 times 49 equals 14.7

49-14.7=34.3

You have 54 pictures to put in a photograph album. Each page of the album holds 4 pictures. How many pages can you fill?

Answers

Answer:

You can fill 13.5 pages

Step-by-step explanation:

You would do 54 divided by 4 equals 13.5

Subtract.
(-9r - 3) - (7r - 1)
Submit

Answers

Answer:

-16r -2

Step-by-step explanation:

plz brainliest :)

do you want an explanation?

HELP PLS I'LL GIVE BRAINLIEST!!!!!

Answers

Answer:

wht is you need help on? you just gave us a paper not saying anything else

Step-by-step explanation:

You want to estimate the mean number of sentences in a magazine advertisement.How many magazines advertisements must be included in the sample if you want to be 95% confident that the sample mean is within one sentence of the population mean

Answers

Complete question:

You want to estimate the mean number of sentences in a magazineadvertisement. How many magazine advertisements must beincluded in the sample if you want to be 95% confident that thesample mean is within 1 sentence of the population mean ? (sigma =5)

Answer:

96

Step-by-step explanation:

We have level of confidence = 95%

Alpha = 1-0.95

= 0.05

Alpha/2 = 0.025

Z-alpha/2 = 1.96

E = margin of error = 1

For this question the formula to derthe sample size is given as:

n = [(Za/2 x sigma)/E]²

n = (1.96 x 5/1)²

n = 9.8²

= 96.04

So 96 magazines advertisement must be included in the sample to be 95% confident.

URGENT HELP THIS IS FOR DWREAD ONLY

Answers

Answer:

(-1,0) and (3,0)

Step-by-step explanation:

The x-intercepts are the points where the graph crosses the x-axis. (-1,0) and (3,0)

Estimate 43,059 ÷ 62 = 2. Estimate 11,117 ÷ 96 = 3. Estima.24,743 ÷ 54 =

Answers

Answer:

466.8490566

Step-by-step explanation:

use your calculator

can you just answer this question?

Answers

It should be B 7 Pack for $1.82

Answer:

3 packs of water because its one one cent less then the other question

.25>.26

Step-by-step explanation:

Can someone help me

Answers

Answer:

3 cm

Step-by-step explanation:

First, we have to understand what happens if two shapes are similar. When two shapes are similar, the angles are equal in both. This means the sides will be in the same ratio from one shape to another.

[tex]\frac{7.2}{t}=\frac{9.6}{4}[/tex]

Using the equation above, we can find t. We use cross multiplication (ad = bc)

7.2 * 4 = 9.6t

9.6t = 28.8

t = 3 cm

What is a deduction ?

Answers

the action of deducting or subtracting something.
Example: "the dividend will be paid without deduction of tax"


HELP PLZ HURRY .What is the solution to the system of equations?

a(5,0)
b(0,5)
c(0,-5)
d(-5,0)

Answers

The answer to this question is c

Find the percent of change, original: $75 new: $60

Answers

Answer:

80%

Step-by-step explanation:

60/75 = 4/5 = 0.80

Therefore, the percentage of change is 80%.

80% is the rate of change in that equation

. The length of the long-distance calls made by the employees of a company followed a normal distribution with a mean of 6.5 minutes and a standard deviation of 2 minutes. a. What is the probability that a call lasts less than 4 minutes

Answers

Answer:

The probability that a call lasts less than 4 minutes  

 P(X<4) = P(Z<-1.25) = 0.1056

Step-by-step explanation:

Step(i):-

Given mean of the population = 6.5 minutes

Given standard deviation of the Population = 2 minutes

Let 'X' be the random variable in normal distribution

Given X = 4

[tex]Z= \frac{x-mean}{S.D} = \frac{4-6.5}{2} = -1.25[/tex]

Step(ii):-

The probability that a call lasts less than 4 minutes

P(X<4) = P(Z<-1.25)

           = 1-P(z>1.25)

          = 1 - ( 0.5 +A(1.25)

         = 1-0.5 - A(1.25)

       = 0.5 - 0.3944    ( from normal table)

       = 0.1056

Final answer:-

The probability that a call lasts less than 4 minutes  

 P(X<4) = P(Z<-1.25) = 0.1056

         

a=3, b=15, c=Pythagorean
theorem

Answers

Answer:

Step-by-step explanation: Given a=3 and b=15,

c = 3√26 = 15.297058540778

∠α = 11.31° = 11°18'36" = 0.1974 rad

∠β = 78.69° = 78°41'24" = 1.3734 rad

area = 22.5

perimeter = 33.297058540778

h =  

15√26

26

= 2.9417420270728


What is the solution of the system of equations? (_,_)

Answers

Answer:

0, 5

Step-by-step explanation:

HELP KHAN ACADEMY BE QUICK WILL GIVE BRAINLIEST.

Answers

Answer:

Just make a duplicate tab, disconnect your internet, click use a hint until it gives you the answer, then when you get it close that tab, reconnect the internet then kpow

Step-by-step explanation:

your welcome lol

Answer: I'm not quite there yet. lol

PLEASE HELP ME ASAP!!!!!!!!!

Answers

Answer: B) 2&3

Step-by-step explanation:

7/3 is 2.33333 repeating which in a complete fraction is 2 1/3.

On a number line, your answer would between 2 and 3.

Andrew drew 20 drawings and 90 pictures how many times did he draw and painted

Answers

Answer:

110

Step-by-step explanation:

90 + 10

PLEASE HELP ASAP!! Will give 20 points


You start with 100 dollars in your bank account. At your favorite coffee shop you purchase 7 lattes that cost 5 dollars each. Write an expression to describe how much money you will have left in your bank account after you buy 7 lattes. Use the letter n for your variable.

Write expression: __________

What is your balance after buying 7 Lattes

Answers

Answer:

7x5=M

*M is for Money*

7x5=35

100-35=

65 is the balance

I WILL GIVE BRAINLIEST!! PLEASE HURRY IM TIMED.

answer choices

A. -5/2
B. -2/5
C. -3/4
D. -4/3

Answers

Answer:   A. -5/2

Step-by-step explanation:

Given: Parallelogram KLMN

Prove: ∠N≅∠L and ∠M≅∠K

Answer:
PLZ ANSWER FAST WILL GIVE 100 POINTS

Answers

Answer:

See attached

Step-by-step explanation:

The answer is in the attached picture below

Order the lengths of the sides in the given figure from least to greatest.

AC, AB, BC

BC, AB, AC

AC, BC, AB

AB, AC, BC

Answers

Answer:

AC,BC,AB

Step-by-step explanation:

CORRECT ME IF ME WRONG

Help me please will give brainliesttt

Answers

For the first question the answer would be Enlarged.
For the second question, the Scale Factor is 1/4, which is a reduction
I agree with the guy or girl above me :)

Factor 7x + 21 using the GCF

Answers

Answer:

7(x+3) GFC=7

Step-by-step explanation:

Answer:7(x+3)  

Step-by-step explanation: Divide 7 on both sides which gives you 3 as your GCF so you write 7(x+3) .

Hope it  helps :)  

Solve the system of equations.

-5x + 4y = 3
X = 2y - 15

Answers

Answer:

x=9

y=12

Step-by-step explanation:

. Substitute the given value of x into the equation so... -5(2y-15)+4y=3

. y=12

. Substitute the given value of y into the equation x=2y-15 so... x=2 x 12-5

. x=9

.The possible solution of the system is the ordered pair (x,y) so... (x,y)=(9,12)

PLEASE ANSWER THIS I AM ON THE LAST SRAW WITH MY MOM

Answers

Answer:

A .25

Step-by-step explanation:

Answer:

A

Step-by-step explanation:

3 dozen is 3 x12 because a dozen is 12. Do 9/36, you get $.25. Sorry about your mom lol.

6 points
15. Rectangle JKLM with vertices J(8, 11), K(14, 11), L(14,-4), and M(8,-4):
scale factor k = 1/3, centered of dilation at (5,2). What are the coordinates
of J'? *

Answers

That would be 14th to the 1 to four power ur welcome

Greg's found 72-24 first be subtracted 20 because he think it was easier.Use words and numbers to explain greg's answer

Answers

answer:

its correct as long as he subtracts 4 after that.

Step-by-step explanation:

That is because if you only subtract part of the first number, the answer will be wrong. and the question is also written a bit wierd.

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