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4 years ago

Plz help me tyyyy :)))

Mathematics

1 answer:

Natalka [10]4 years ago

8 0

Answer:

4 :)

Step-by-step explanation:

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A rectangle has a length of x + 5 and a

Romashka [77]

Answer:

The end equation you get is p = 6x - 8

Step-by-step explanation:

p = 2l + 2w

p = 2(x + 5) + 2(2x - 9)

p = 2x + 10 + 4x - 18

p = 6x - 8

7 0

3 years ago

Read 2 more answers

The sum of the first 10 terms of an arithmetic sequence is 235 and the

Degger [83]

Answer:

$\bold{a_1 = -42.65}\\\\\bold{d=14.7}$

Step-by-step explanation:

The sum of the first 10 terms of an arithmetic sequence is:

$S_{10}=a_1+a_2+...+a_{10}=\dfrac{a_1+a_{10}}{2}\cdot10=\dfrac{2a_1+(10-1)d}{2}\cdot10$

$\dfrac{2a_1+(10-1)d}{2}\cdot10=235\\\\(2a_1+9d)\cdot5=235\\\\2a_2+9d=47$

the sum of the second 10 terms is: a₁₁ + a₁₂+...+ a₂₀

And the sum of the first 20 terms of an arithmetic sequence is:

$S_{20}=a_1+a_2+...+a_{10}+a_{11}+...+a_{20}=\dfrac{2a_1+(20-1)d}{2}\cdot10$

so the sum of the second 10 terms is:

$a_{11}+a_{12}+...+a_{20}=S_{20}-S_{10}$

Therefore we have:

$\dfrac{2a_1+(20-1)d}{2}\cdot10-\dfrac{2a_1+(10-1)d}{2}\cdot10=735\\\\(2a_1+19d)\cdot5-(2a_1+9d)\cdot5=735\\\\2a_1+19d-(2a_1+9d)=147\\\\10d=147\\\\d=14.7$

and:

$2a_1+9\cdot14.7=47\\\\2a_1+132.3=47\\\\2a_1=-85.3\\\\a_1=-42,65$

3 0

3 years ago

Write the expression in expanded notation for (-3 power of 5)

Murljashka [212]

Step-by-step explanation:

A. Base = (-3)

B. Exponent = 5

C. (-3)^5

= (-3) × (-3) × (-3) × (-3) × (-3) (In expanded notation form)

D. Evaluation of equation will be = -243

4 0

3 years ago

WILL MARK BRAINLIEST IF YOU GET IT RIGHT.

german

Answer:abd

Step-by-step explanation:

7 0

3 years ago

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Find the perimeter to this irregular shape.

Snowcat [4.5K]

Answer:23 mm

Step-by-step explanation:

add both 15 and 8 because they are as long as the one on the bottom

5 0

3 years ago

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Plz help me tyyyy :)))​

Plz help me tyyyy :)))