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IRISSAK [1]
3 years ago
10

14d + 21 and 7(2d + 3)

Mathematics
2 answers:
Gennadij [26K]3 years ago
3 0

Answer:

the answer is 28d + 42

Step-by-step explanation:

multiply what's on the brackets them add

Vlada [557]3 years ago
3 0
Answer:
D can be any value

Explanation:
First, we apply the distributive property to 7(2d+3) by multiplying 7 by both values (this is to open up the parentheses)

7(2d+3)
=14d+21

Now, we learn that 7(2d+3)=14d+21, which is the same thing as 14d+21=14d+21.

14d+21=14d+21
14d-14d=21-21
0=0

Because we’ve reached 0=0, which is a true statement, and not a value for d, d can be any value and the statements will be true.

I hope this helps!
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Does this sum converge: show steps
ehidna [41]

Answer:

Yes

Step-by-step explanation:

\sum_{n=1}^{\infty} e^{-\sqrt{n} } \\\sum_{n=1}^{\infty} (\frac{1}{e})^{\sqrt{n} }

If we say u = √n, then:

\sum_{u=1}^{\infty} (\frac{1}{e})^{u}

This is a geometric series.  Since |1/e| < 1, the series converges.

6 0
4 years ago
Eight less a number is less than or equal to five
hoa [83]
Umm what lol?? I think it’s less than but idk
5 0
3 years ago
Can someone do this for me please?
Scilla [17]

Answer:

no

Step-by-step explanation:

3 0
3 years ago
An isosceles triangle with congruent sides of 16.2 cm and a third side half that length
Zielflug [23.3K]

Answer: option iii

The perimeter of an isosceles triangle with congruent sides of 16.2 cm and a third side half that length is 16.2+16.2+8.1 = 40.5 cm

Explanation:

The perimeter of an isosceles triangle with congruent sides of 16.2 cm and a third side half that length is 16.2+16.2+8.1 = 40.5 cm

First side is = 16.2 cm

Second side is = 16.2 cm

Third side = half of 16.2 = 8.1 cm


The perimeter of an isosceles triangle with congruent sides of 16.2 cm and a third side half that length is 16.2+16.2+8.1 = 40.5 cm

7 0
3 years ago
Read 2 more answers
F(x) = -x^2-20<br> find f(9)
Ivanshal [37]

Answer:

f ( x ) = - 101

Step-by-step explanation:

Step 1:

f ( x ) = - x² - 20   Function

Step 2:

f ( x ) = - 9² - 20      Substitute x

Step 3:

f ( x ) = - 81 - 20    Exponents

Answer:

f ( x ) = - 101   Subtract

Hope This Helps :)

5 0
4 years ago
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