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3 years ago

Pls help I’ll brainlest ASAP

Mathematics

2 answers:

Musya8 [376]3 years ago

8 0

<h2><u>Given</u></h2>

$- 5c + 9c = - 20$

Value of c term

<h2><u>Solution</u></h2>

$- 5 + 9c = - 20 \\ \\ = > 4c = - 20 \\ \\ = > c = \frac{ - 20}{4} \\ \\ = > c = \cancel \frac{ - 20}{4} \\ \\ = > c = - 5$

<h3>Hope This Helps</h3>

Strike441 [17]3 years ago

6 0

Answer:

the answer is at the left not the right

Step-by-step explanation:

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4 years ago

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3 years ago

The relationship between women’s whole-number shoe sizes and foot lengths is an arithmetic sequence, where an is the foot length

ad-work [718]

Answer:

The explicit formula for Arithmetic Sequence is $a_n=7.02+0.33n$

Step-by-step explanation:

Given: Foot length & shoe size in AP.

$a_n$ is foot length and n is shoe size.i.e., $a_{12}=11\:and\:a_7=9.33$

To find: Formula for Arithmetic sequence .i.e., $a_n$

From question,

$a_{12}-a_7=11-9.33=1.67$

Also, we know that

$a_{12}=a_7+5d\\5d=a_{12}-a_7\\5d=1.67\\d=\frac{1.67}{5}\\\\d=0.33$

Now, consider

$a_7=a_1+6d\\a_7=a+6d\\a=a_7-6d\\a=9.33-6\times0.33\\a=9.33-1.98\\a=7.35$

Thus using formula of $a_n$ we get,

$a_n=a+(n-1)d\\a_n=7.35+(n-1)\times0.33\\a_n=7.35+0.33n-0.33\\a_n=7.02+0.33n$

Therefore, The explicit formula for Arithmetic Sequence is $a_n=7.02+0.33n$

4 0

3 years ago

Read 2 more answers

PLEASE HELP !!!!! Find the surface area of a cone with radius of 7.9 cm and slant height of 3.7 cm, to the nearest square unit.

Anon25 [30]

For this case what you need to know is that the formula for the total surface area of a straight cone is
S.A = πrl + π r ^ 2
Substituting the values we have:
S.A = (3.14) * (7.9) * (3.7) + (3.14) * (7.9) ^ 2
S.A = 287.7496 cm ^ 2
Answer:
the surface area of a cone is
D) 288 cm ^ 2

3 0

4 years ago