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Ipatiy [6.2K]
3 years ago
6

Linear system please help 45 point * please please please help

Mathematics
2 answers:
Nikolay [14]3 years ago
5 0

Answer:

a) elimination method

b) substitution method

c) substitution method

Step-by-step explanation:

For the first part we can elimate the y variable by subtracting the equations. We can then find the value of x.

For the second part we can substitute y as 2x+5 in the second equation and solve for x.

For the third part we can substitute y as 4x+3 in the first equation and solve for x.

tino4ka555 [31]3 years ago
3 0

Answer:

a.Elimination method

b.substitution method

c.substitution method.

Step-by-step explanation:

the reason I'm going to use elimination for the first one a. its because we were given two equations with coefficients and to solve for them, we need to eliminate one of the variables and solve for the other then use the answer for the non eliminated variable to solve for the eliminated variable and its quite easy to do so.

for b and c. I choose to use substitution method to answer the equations because the y equation was given to us. The easiest thing to do is just to substitute Y equation in the given equation and solve for your variables.

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sattari [20]
<span>So we need to find the average speed of the bus that travels 20 km in 30 minutes. Average speed is defined as: Average speed=distance travelled/time taken or: v=s/t. We know s=20 km and t=30 minutes=0.5h. So after we input our numbers in the equation, we get: v=20km/0.5h=40km/h. So the correct answer is C) 40km/h.</span>
4 0
3 years ago
Read 2 more answers
Please help especially with a!!
77julia77 [94]

Answer:

a) 25/324

b) 1/4

c) 1/3

Step-by-step explanation:

a) [⅓A + ⅓B]² = (⅓)²[A + B]²

= (1/9) [½ + ⅓]²

= (1/9)(⅚)²

= (1/9)(25/36)

= 25/324

b) ½ × ½ = ¼

c) (½ × ⅓) + (⅓ × ½) = 2 × ⅙ = ⅓

6 0
3 years ago
Help me please come on please.
Alexeev081 [22]
I agree with 11.5 pounds
7 0
3 years ago
after 6 months, $1.78 simple interest was earned on an investment of $890. what was the annual interest rate
umka21 [38]
First you have to double the simple interest to get the amount earned in 1 year. That gives $3.56 earned and a total balance of $893.56
r = (1/t)(A/P - 1)  t=time, A=amount of money with interest, P=amount invested
r = (1/1)((893.56/890) - 1) = 0.004
r = 0.004
 now convert to a decimal to get .04 = 4%
6 0
3 years ago
Circle the two equations that represent the linear function graphed below.
Arlecino [84]

Answer:

poop lol

Step-by-step explanation:

3 0
3 years ago
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