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brilliants [131]
2 years ago
11

What is the answer for this 3x+4x+5x+...+43x

Mathematics
1 answer:
sweet-ann [11.9K]2 years ago
7 0

Answer:

1032x

Step-by-step explanation:

3x+4x+\cdots+43x=x(3+4+\cdots+45) \\ \\ =43x\left(\frac{45+3}{2} \right) \\ \\ =43(24x) \\ \\ =1032x

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What best describes index fossils
KonstantinChe [14]

Answer:

Index fossil, any animal or plant preserved in the rock record of the Earth that is characteristic of a particular span of geologic time or environment. A useful index fossil must be distinctive or easily recognizable, abundant, and have a wide geographic distribution and a short range through time.

Step-by-step explanation:

6 0
3 years ago
Financial planners recommend that families save about 5% of their take-home pay. Ed and Sherrie save $90 each pay period from th
Ratling [72]

Answer:

Ed and Sheerie save 7.5%.

Step-by-step explanation:

This question can be solved using a rule of three.

Ed and Sherrie save $90 each pay period from their combined paychecks, which total $1200. What percent do Ed and Sherrie save?

How much of $1200 is $90? $1200 is 100% = 1, $90 = x. So

$1200 - 1

$90 - x

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x = \frac{90}{1200}

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Ed and Sheerie save 7.5%.

7 0
3 years ago
The chart below shows conversion between gallons and fluid ounces.
Ainat [17]
<h3>Answer:  768</h3>

======================================================

Explanation:

To go from gallons to fluid ounces (abbreviation fl oz), we multiply by 128

For example, 2 gallons becomes 2*128 = 256 fl oz as shown in the table.

Another example: 3 gallons = 3*128 = 384 fl oz.

Therefore, 6 gallons would be 6*128 = <u>768</u> fl oz.

To go in reverse, from fl oz to gallons, we divide by 128.

5 0
2 years ago
Read 2 more answers
Please help me with this question
sergejj [24]

Answer:

49π

Step-by-step explanation:

Circle area: πr^2

Since A to C is 14, and they're both in the center, A to B and B to C will both be 7 as a radius.

Since we know the radius, we can put it in the formula, πr^2.

We only need to solve for one circle, since both circles are the same. By solving the circle, we will put in 7 for the radius, giving us π7^2, which is 49π.

5 0
3 years ago
If m &lt;1=45°,Which other angles have a measure of 45°? check all that apply<br>​
Alex777 [14]

Answer:

4 and 5 hope this helps

Step-by-step explanation:

7 0
3 years ago
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