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3 years ago

PLEASE HELP I WILL GIVE BRAINLIEST

Mathematics

1 answer:

yan [13]3 years ago

6 0

Answer: part A its -1/9 and for part B its -1/18 trust me i did the test it was hard but I got an 80 and I got part A and B right

Step-by-step explanation:

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What expression is quivelent to 4x-5

mariarad [96]

Answer:

where are the answer choices?

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3 years ago

Describe the transformations that will map triangle A to triangle B and illustrate the similarity between the two triangles

rosijanka [135]

A) Reflect across y-->(5, 2), Translate 5 down-->(5, -3) ... nope. Cross off A
B) Reflect across x-->(-5, -2), reflect across y-->(-5, -2) ... nope 
C) Translate 4 down -->(5,-2), rotate 180-->(-5, 2) ... nope 
It must be D, but test just to be sure: 
D) Reflect across x-->(-5, -2), rotate 90 counter-clockwise -->(2, -5) yes.

If you noticed that rotating B to be upright produced a mirror image of A, then you know that an odd number of reflections were involved and could eliminate answers B and C immediately.

Hope this helps

6 0

3 years ago

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Show work and explain with formulas.

Natasha_Volkova [10]

23 Answer: $\bold{\dfrac{29,524}{9}}$

Step-by-step explanation:

$\dfrac{1}{9}+\dfrac{1}{3}+1+...+2187\\\\\\a_1=\dfrac{1}{9}=3^{-2}\qquad r=3\qquad a_n=2187\\\\\underline{\text{Find n:}}\\a_n=a_1\cdot r^{n-1}\\2187=3^{-2}(3)^{n-1}\\2187=3^{n-3}\\3^7=3^{n-3}\\7=n-3\\10=n$

$\underline{\text{Find the sum:}}\\S_n=\dfrac{a_1(1-r^n)}{1-r}\\\\\\S_{10}=\dfrac{\frac{1}{9}(1-3^{10})}{1-3}\\\\\\.\quad =\dfrac{1-59,049}{(9)(-2)}\\\\\\.\quad =\dfrac{-59,048}{9(-2)}\\\\\\.\quad =\large\boxed{\dfrac{29,524}{9}}$

24 Answer: $\bold{\dfrac{364}{9}}$

Step-by-step explanation:

$a_1=27\qquad r=\dfrac{1}{3}\qquad n=6\\\\S_n=\dfrac{a_1(1-r^n)}{1-r}\\\\\\S_6=\dfrac{27(1-\frac{1}{3}^6)}{1-\frac{1}{3}}\\\\\\.\quad =\dfrac{27(\frac{728}{729})}{\frac{2}{3}}\\\\\\.\quad =\dfrac{27(728)}{729}\cdot \dfrac{3}{2}\\\\\\.\quad =\large\boxed{\dfrac{364}{9}}$

25 Answer: n=7

Step-by-step explanation:

$\{-6,\ -12,\ -24,\ ...\ \}\\\\a_1=-6\qquad r=2\qquad S_n=-762\\\\S_n=\dfrac{a_1(1-r^n)}{1-r}\\\\\\-762=\dfrac{-6(1-2^n)}{1-2}\\\\\\-762=\dfrac{-6(1-2^n)}{-1}\\\\\\\dfrac{-762}{6}=1-2^n\\\\-127=1-2^n\\\\-128=-2^n\\\\128=2^n\\\\2^7=2^n\\\\\large\boxed{7=n}$

3 0

3 years ago

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Pleaseeeeee help me out quickkk solve for x

xxTIMURxx [149]

Answer:

x = 27.2

Step-by-step explanation:

Apply trigonometric function to solve for x.

Reference angle = 54°

Side length opposite to reference angle = 22

Hypotenuse = x

We would apply SOH:

Sin 54 = Opp/Hyp

Sin 54 = 22/x

x*sin 54 = 22

x = 22/sin 54

x = 27.1934955 ≈ 27.2 (nearest tenth)

8 0

3 years ago

I'm confused... Solve the inequality -5(x - 1) > -40. Show your work.

riadik2000 [5.3K]

Answer:

x<9

Step-by-step explanation:

-5(x-1) > -40 ---> divide each side by -5(you flip the inequality because of dividing by negative)

(x-1)<8 ---> add 1 to each side

x<9

4 0

3 years ago

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