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Ilia_Sergeevich [38]
3 years ago
10

Solve this system of linear equations. separate the x-and y-values with a comma.

Mathematics
1 answer:
frez [133]3 years ago
3 0

Answer:

(x,y)=-(1,1)

Step-by-step explanation:

-2x=8-6y (divide by -2)

=> x=-4+3y

-15x=21-6y (divide by -3 for simplicity)

=>5x=-7+2y

We know that  x=-4+3y, insert this into expression "5x=-7+2y"

5(-4+3y)=-7+2y

-20+15y=-7+2y

15y-2y=20-7

13y=13

y=1

Since x=-4+3y we can find x by using y=-1

x=-4+3(1)

x=-1

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If rectangle is 8 feet long and (7+x) feet wide. what is the area of the rectangle in square feet?
Ksivusya [100]

if the length is 8ft and the width is (7+x) then the area would be 56+8x, if x is unknown.

5 0
4 years ago
A container holds 9 red markers, 13 blue markers, and 17 green markers. You will randomly select two markers without replacement
IRISSAK [1]

Answer:

a.

                         R-------8/38--------RR

R------9/39--------B-------13/38-------RB

                          G------17/38--------RG

                          R-------9/38--------BR

B--------13/39------B-------12/38-------BB

                           G-------17/38-------BG

                             R-----9/38--------GR

G---------17/39-------B------13/38-------GB

                              G------16/38-------GG

b).

  • 9 ways
  • ways you can select 1 blue are; RB,BR,BG,GB

RB=9/39 × 13/38=3/38

BR= 13/39 × 9/38 =3/38

BG= 13/39 × 17/38=17/114

GB= 17/39 × 13/38=17/114

=3/38 +3/38+17/114+ 17/114 =26/57

  • Probability of selecting 2 red markers= RR = 9/39 × 8/38 =12/247

  • Probability of selecting a green marker and then a red marker= GR= 17/39×9/38 =51/494

8 0
4 years ago
The _____ of a polynomial is another name for the x- intercepts .
podryga [215]
The answer is root. Hope this helps!
6 0
3 years ago
Read 2 more answers
The mean of the following data values is 32. <br> 19, 23, 35, 41, 42<br> A. True <br> B. False
wariber [46]

Answer:

False i think

Step-by-step explanation:

6 0
3 years ago
Roland’s Boat Tours sells deluxe and economy seats for each tour it conducts. In order to complete a tour, at least 1 economy se
vovangra [49]

Roland’s Boat Tours will make more money if they sell more economy seats, hence the maximum profit is attained if they only sell the minimum deluxe seat which is 6

6*35+ 24*40 = 210+960= $1170

<em />

Given details

To make a complete tour, at least 1 economy seats

and 6 deluxe seats

Maximum passengers per tour = 30

<em />

<em>"Boat Tours makes $40 profit for each </em><em>economy</em><em> seat sold and $35 profit for each deluxe seat sold"</em>

<em> </em>Therefore, to maximise profit, he needs to take more of economy seats

Hence

Let a deluxe seat be x and economy seat be y

Maximise

6 x+ 24y = 30

The maximum profit from one tour is  = 6*35+ 24*40 = 210+960= $1170

Learn more

brainly.com/question/25828237

<em />

7 0
2 years ago
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