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kifflom [539]
3 years ago
7

Solve the system of linear equations by substitution.

Mathematics
2 answers:
natali 33 [55]3 years ago
8 0
Plug in -x+9 in for y and you should get (2,7)
Goryan [66]3 years ago
6 0

Answer:

hey! This was the only part of mathematics I ever enjoyed! So consider this both of our lucky days: Answer is : (2,7)

Step-by-step explanation:

basically plug in Y to the first equation as sox + 4(-x + 9) = 30

x - 4x + 36 = 30- 3x = - 6

x = 2

then plug that in to Y!

Y = -(2) + 9

so Y = 7

and our answer is : (2,7)

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7. In triangle ABC, side AB is 2 cm shorter than side
Mamont248 [21]

Answer:

AC = 21, AB = 19, and BC = 22

Step-by-step explanation:

If x is the length of AC, then:

AB = x − 2

BC = x + 1

The perimeter is the sum of all three sides:

62 = x + x − 2 + x + 1

62 = 3x − 1

63 = 3x

x = 21

Therefore:

AC = 21, AB = 19, and BC = 22

3 0
3 years ago
The table shows the number of songs and the length of the playlist on an iPad. Each song is the same leng
horrorfan [7]

Answer:4 minutes

Step-by-step explanation:

16/4 is 4

36/9 is 4

64/16 is 4

4 0
3 years ago
If A - B = {2,4,6}, B - A = {0,1,3}, and A∪B = {0,1,2,3,4,5,6,7,8}. What is A∩B?
jek_recluse [69]

Answer:

{5,7,8}

Step-by-step explanation:

A-B = {2,4,6} => A={2,4,6}

B - A = {0,1,3} => B= {0,1,3}

A∪B = {0,1,2,3,4,5,6,7,8}

=> A = {2,4,5,6,7,8}

B= {0,1,3,5,7,8}

=> A∩B = {5,7,8}

4 0
3 years ago
If 4 pounds of grapes cost $9.96, what is the unit price?
e-lub [12.9K]

Answer:

if you mean the unit price is per lb

2.49

Step-by-step explanation:

9.96/4

5 0
3 years ago
Read 2 more answers
If P(A)=0.54 then what value of P(B) the event A and B are complementary event
aleksley [76]

Answer:

<em>P(B) = 0.46</em>

Step-by-step explanation:

<u>Probability</u>

The complementary event of a given event A is defined as "not A" or the event that A does not occur.

For example, if A is defined as 'getting a job', then the complement of A is 'not getting a job'.

Event A and its complementary event (call it B) must satisfy:

P(A) + P(B) = 1

If we know P(A)=0.54, then

P(B) = 1 - P(A)

P(B) = 1 - 0.54

P(B) = 0.46

7 0
3 years ago
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