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4 years ago

What are the first four terms of the sequence given by the formula below? an= -2n + 4

2 answers:

6 0

In order to solve this problem, We need to substitute the first four numbers (1,2,3,4) for n. After this we calculate:
First item:
a1= -2*1 + 4=-2+4=2
Second item:
a2= -2*2 + 4 =-4+4=0
Third item:
a3= -2*3 + 4 =-6+4=-2
Forth item:
a4= -2*4 + 4 =-8+4=-4

So the first 4 items are: 2,0,-2,-4..

lubasha [3.4K]4 years ago

3 0

Answer:

Sequences and Series Online Practice Conexus review:

100%, Hope this helps Y'all:)

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The point (1,1) is the image under the translation (x,y)-> (x+3,y-3). What is the preimage of this point?

wel

Answer:

(-2,4)

Step-by-step explanation:

$\text{pre-image}->\text{image}$

$(x,y)->(x+3,y-3)$

$(x,y)->(1,1)$

This implies $(x+3,y-3)=(1,1)$ .

This means $x+3=1$ and $y-3=1$ .

Subtract 3 on both sides for first equation: $x=1-3=-2$ .

Add 3 on both sides for the second equation: $y=1+3=4$ .

So the pre-image (x,y) is (-2,4) if the image is (1,1).

Let's check:

$(x,y)->(x+3,y-3)$

$(-2,4)->(-2+3,4-3)$

$(-2,4)->(1,1)$

So the solution has been checked and verified.

6 0

3 years ago

Evaluate each expression when a= - 4 and b= 3 ab

Andrews [41]

Answer:

-12

Step-by-step explanation:

<u>Step 1: Substitute</u>

ab -> -4 for a and 3 for b

(-4) * (3)

Answer: -12

6 0

4 years ago

How do I solve: x^2+3=84.

balandron [24]

Answer:

x=9, x=-9

Step-by-step explanation:

subtract 3 from both sides

x^2=81

then squareroot both sides (remember that there is a positive and negative solution!)

x=9, x=-9

7 0

3 years ago

Read 2 more answers

What is an equation for this line?

Sedbober [7]

Answer:

The equation of the line is y=-x

Step-by-step explanation:

To find the equation for a line, we need to know 2 points.

One of the points is (0,0) because it goes through the origin. Another point is (5,-5). We can calculate the slope because we have 2 points using the formula.

m = (y2-y1)/(m2-m1)

m = (-5-0)/(5-0)

m = -5/5

m=-1

The slope is -1

We know the y intercept (where it crosses the y axis) is 0. Using the slope intercept form of a line

y = mx+b

y =-1x+ 0

y = -x

The equation of the line is y=-x

6 0

3 years ago

Hii please please help i’ll give brainliest if you give a correct answer tyyyyy

bezimeni [28]

<h2><u>PLEASE MARK BRAINLIEST!</u></h2>

Answer:

40%

Step-by-step explanation:

6 apples out of 15 fruits = $\frac{6}{15}$

$\frac{6}{15}$ is equivalent to $\frac{2}{5}$

$\frac{2}{5}$ is equivalent to 40%

<em>So your answer is 40%</em>

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I hope this helps!

- sincerelynini

7 0

3 years ago