Determine the AP whose 3rd term is 5 and 7th term is 9

Mathematics

1 answer:

lina2011 [118]3 years ago

4 0

what is the question ask to do

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2x + y = 3 x = 2y - 1

Ad libitum [116K]

2x+ y = 3
x = 2y - 1
Make sure there are NO SPACES in your answer. Include a comma in your answer.
It looks like I could substitute the x=2y-1. Into 2x+y=3
2(2y-1)+y=3
4y-2+y=3
5y=5
y=1
x=2(1)-1
x=1

(1,1)
CHECK
2x+y=3
2(1)+(1)=3
2+1=3
3=3
Left hand side=Right hand side
Check other equation
x=2y-1
1=2(1)-1
1=1
Therefore the solution is (1,1). Since the left hand side= right hand side in each equation

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3 years ago

Vectors... Let u = <-3, -5>, v = <-3, 1>. Find u + v.

Anni [7]

-3 + -3 = 0
-5 + 1 = -4
vector = < 0,-4 >

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3 years ago

Tan(x)= 3/2 Find X Plz help

Novosadov [1.4K]

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With a calculator, press second or shift and then tan to find the degrees.

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3 years ago

Abel has 3,330 toothpicks. He wants

ehidna [41]

Answer:

3,330/18=185

185 columns*18 rows

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3 years ago

For a line that goes through points (2,-2) and (1.-6), what is the equation

sesenic [268]

Answer:

$y + 6 = 4[x - 1]\:or\:y + 2 = 4[x - 2]$

Step-by-step explanation:

First find the rate of change [slope]:

$\frac{-y_1 + y_2}{-x_1 + x_2} = m$

$\frac{2 - 6}{-2 + 1} = \frac{-4}{-1} = 4$

Then plug each of these coordinates into the Point-Slope Formula, $y - y_1 = m[x - x_1].$ Now remember, in this formula, all the negative symbols give the OPPOSITE terms of what they really are, so be EXTREMELY CAREFUL inserting the coordinates into the formula with their CORRECT SIGNS:

$y + 6 = 4[x - 1]\:or\:y + 2 = 4[x - 2]$

I am joyous to assist you anytime.

4 0

3 years ago