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2 years ago

Write an expression to represent: Eight more than the product of two and a number x xx.

Mathematics

1 answer:

gizmo_the_mogwai [7]2 years ago

7 0

Answer:

2x+8

Step-by-step explanation:

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the atomic number and atomic weight of chlorine element is 17 and 35 respectively. Calculate the number of proton, neutron and e

laila [671]

No of protons=Atomic No=17
No of electrons=No of protons=17
No of neutrons=Massno-No of protons

$\\ \sf\longmapsto 35-17$

$\\ \sf\longmapsto 18neutrons$

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2 years ago

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Will give correct answer brainliest

Helga [31]

Answer:

can you please type it cause I can't see I help

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2 years ago

Simplify (3v5+8v3−10v2)−(−12v5+4v3+14v2) . Write answer in standard form.<br> <br>

Tatiana [17]

Answer:

15v^5+4v^3-24v^2

Step-by-step explanation:

Distribute the Negative Sign:

=3v5+8v3−10v2+−1(−12v5+4v3+14v2)

=3v5+8v3+−10v2+−1(−12v5)+−1(4v3)+−1(14v2)

=3v5+8v3+−10v2+12v5+−4v3+−14v2

Combine Like Terms:

=3v5+8v3+−10v2+12v5+−4v3+−14v2

=(3v5+12v5)+(8v3+−4v3)+(−10v2+−14v2)

=15v5+4v3+−24v2

Answer:

=15v5+4v3−24v2

Hope this helps! :)

5 0

2 years ago

Which of the following expressions correctly uses the properties of summations to represent

madam [21]

Answer:

Option C is correct.

$7 \cdot \sum_{i=1}^{18} i^2 + 9 \cdot 18$

Step-by-step explanation:

Given the expression: $\sum_{i=1}^{18} (7i^2+9)$

Using properties of summation:

$\sum_{i=1}^{n} (a+bi) =\sum_{i=1}^{n} a + \sum_{i=1}^{n} bi$

$\sum_{i=1}^{n} a = an$

Using properties of summation in the given expression we have;

$\sum_{i=1}^{18} (7i^2+9)$

= $\sum_{i=1}^{18} 7i^2 + \sum_{i=1}^{18} 9$

= $7 \cdot \sum_{i=1}^{18} i^2 + 9 \cdot 18$

Therefore, the following given expression uses the properties of summation to represents is, $7 \cdot \sum_{i=1}^{18} i^2 + 9 \cdot 18$

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2 years ago

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The time required to finish a test in normally distributed with a mean of 70 minutes and a standard deviation of 10 minutes. Wha

zalisa [80]

Note that 60 minutes is 1 standard deviation away from the mean and from recalling the 68-95-99.7 rule, the area that will remain is (100 - 68) = 32%. However, we only want the leftmost portion of this area, so the answer is 32%/2 = 16%.

<span>Choose D.</span>

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2 years ago