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uranmaximum [27]
3 years ago
13

The first three terms of a geometric sequence are

Mathematics
1 answer:
Lisa [10]3 years ago
3 0

Answer:

a4 = 128

a5 = -512

Step-by-step explanation:

a1= -2

q= (-1)^(n+1) × 4

a4 = a1q³ = (-2) (-4)³ = -2 × -64 = +128

a5 = a1q⁴ = (-2) (-4)⁴ = -2 × 256 = -512

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Sarah Beth babysits and earns $10.50 per hour which of the following best represents the relationship between the number of hour
Romashka [77]

Answer:

Step-by-step explanation:

didnt give all the info

7 0
3 years ago
Solve the inequality x + 2 1/2 > -1/2. Graph the solution set on a number line.show your work.
antiseptic1488 [7]

Answer:

x > - 3

Step-by-step explanation:

x + 2\frac{1}{2} > - \frac{1}{2}      First turn 2\frac{1}{2} into an fraction since its easier. So it becomes \frac{5}{2}

x + \frac{5}{2} > - \frac{1}{2}

<u>   - </u>\frac{5}{2}<u>     - </u>\frac{5}{2}<u>  </u>       Do inverse operations, so subtract \frac{5}{2} from both sides.

    x > - \frac{6}{2}          Combine  - \frac{5}{2} with - \frac{1}{2}, which gives us - \frac{6}{2}

    x > - 3          Since we know that 6 divided by 2 is 3.

This would not allow me to attach an image so I am going to type a visual representation f what the graph would look like below)

<-------------O--------------------------------------------------->

-5    -4     -3      -2       -1     0     1     2    3    4     5

So, the number line would be a solid line rather than dashed (but I was not able to attach an image so I kind of had to improvise). When using ≥ ≤ sings the circle of the point is closed. When using < and > signs, the circle of the point is open. Thus, in this scenario since he sign is >, then the circle of the point is open. The direction of the arrow and ray for this equality is going to the right because the answer is that x is greater than - 3, Therefore any values greater than - 3 are a possibility which is why the arrow goes on indefinitely.

 

4 0
3 years ago
Given h(x) = 2x + 2, find
Svetlanka [38]
2x + 2
2(x+1)




where’s the value of X and the given of g(x)=???
5 0
3 years ago
A chemist needs a 30% iron alloy. How many grams of a 70% iron alloy must be mixed with 16 grams of a 20% iron alloy to obtain t
Alex787 [66]
Let x=grams of 70% alloy:
0.70x+16×0.20=0.30(x+16)
0.70x=0.30x+4.8-3.2
0.40x=1.6
x=1.6/0.4=16/4=4g
4 grams of 70% alloy are needed.
6 0
4 years ago
Lynn has a watering can that holds 16 cups of water, and she fills it half full. Then she waters her 23 plants so that each plan
34kurt

Answer:

8/23 cups of water for each plant. (Approx. 0.35 cups for each plant)

(I do hope this is correct)

Step-by-step explanation:

Since Lynn only filled half of her watering can full, it is now holding 8 cups pf water, since 16/2=8. Then, if she water each of her 23 plants equally, so each plan will supposedly get 8/23 cups of water.

3 0
4 years ago
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