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
Alexus [3.1K]
3 years ago
11

3x + 3y =15 and x = -3y -1

Mathematics
1 answer:
saul85 [17]3 years ago
4 0

Answer:

  (x, y) = (8, -3)

Step-by-step explanation:

You can substitute for x in the first equation:

  3(-3y -1) +3y = 15

  -6y = 18 . . . . . add 3 and simplify

  y = -3 . . . . . . . divide by -6

  x = -3(-3) -1 = 8 . . . . find x using the second equation

The solution to this system of equations is (x, y) = (8, -3).

You might be interested in
I need help on this look at picture above. Intercepts. I need help ASAP.
Deffense [45]

Answer:

(0, -6/5)

(-3, 0)

Step-by-step explanation:

y-intercept is when x is 0.

x-intercept is when y is 0.

3 0
3 years ago
Read 2 more answers
The surface area of a cone is found using the formula SA = Pir2 + Pirl. Describe what each part of the formula represents and ho
N76 [4]

Answer:

<em><u>hope</u></em><em><u> </u></em><em><u>it</u></em><em><u> </u></em><em><u>will help uh</u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em>

6 0
3 years ago
Read 2 more answers
A colony of 10 bacteria doubles in size
aleksklad [387]

Answer:

40

Step-by-step explanation:

IT has doubled in size twice 75 =20  +75 =40 = 150 minutes.

7 0
3 years ago
Read 2 more answers
A plan for an executive traveler's club has been developed by an airline on the premise that at least 5% of its current customer
STatiana [176]

Answer:

a) 3.0779

b)2.3264

Step-by-step explanation:

Please see attachment .

7 0
2 years ago
The owner of a construction company would like to know if his current work teams can build room additions quicker than the time
frez [133]

Answer:

The claim that the current work teams can build room additions quicker than the time allotted for by the contract has strong statistical evidence.

Step-by-step explanation:

We have to test the hypothesis to prove the claim that the work team can build room additions quicker than the time allotted for by the contract.

The null hypothesis is that the real time used is equal to the contract time. The alternative hypothesis is that the real time is less thant the allotted for by the contract.

H_0: \mu=0\\\\H_1: \mu

The significance level, as a storng evidence is needed, is α=0.01.

The estimated standard deviation is:

s_M=\frac{s}{\sqrt{n}}=\frac{0.2}{\sqrt{16}} =0.2/4=0.05

As the standard deviation is estimated, we use the t-statistic with (n-1)=15 degrees of freedom.

For a significance level of 0.01, right-tailed test, the critical value of t is t=2.603.

Then, we calculate the t-value for this sample:

t=\frac{x-\mu}{s_M} =\frac{-0.32-0}{0.05}= -6.4

As the t-statistic lies in the rejection region, the null hypothesis is rejected. The claim that the current work teams can build room additions quicker than the time allotted for by the contract has strong statistical evidence.

8 0
3 years ago
Other questions:
  • To express the polynomial d^2+d^3-d+3 in standard form, which term should be written first?
    13·2 answers
  • Please answer as soon as possible thank you
    12·2 answers
  • Which ordered pairs are solutions to the inequality x+3y&lt;−8?
    13·1 answer
  • In a triangle ABC with |AB|=9m,|AC| =6m ,the sides AB and AC are produced to points X and Y respectively such that angleBXY=62°,
    10·1 answer
  • 0.125 as a fraction and percentage​
    15·1 answer
  • Five-card poker hand is dealt at random from a standard 52-card deck.
    12·1 answer
  • Evaluate the expression (19+9)+(-9)
    13·2 answers
  • SOMEONEEEE HELLPP ME OUTTTT!!!!
    5·1 answer
  • Y-5=1/3<br><br><br> Helpppp!!!!!!
    10·1 answer
  • on a blue print a guest bedroom has dimensions 3cm by 5cm. If the blue print is drwn using the scale of 1/2 =2 ft .What is the a
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!