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3 years ago

Help with full calculations, please

Mathematics

1 answer:

beks73 [17]3 years ago

5 0

Answer:

Step-by-step explanation:

8) B(x) = $5^{x +1}$

$5^{x + 1} = 3125 \\\\5^{x +1} = 5^{5}\\\\$

Compare the exponents,

x + 1 = 5

x = 5 - 1

x = 4

$10)2^{x-4}=512\\\\2^{x -4} = 2^{9}\\\\$

Compare exponents,

x - 4 = 9

x = 4 + 9

x = 13

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MrRissso [65]

Answer:

4/8, 1/2

Step-by-step explanation:

7/8 - 3/8 = 4/8

4/8 >>> divide both by 4

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3 years ago

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HELP ME PLEASE I NEED HELP

Olin [163]

Step-by-step explanation:

You should prolly subtract 2 from both sides first.

So you get, -|2/5x + 3| > -1 2/5

Add three to both sides
-|2/5x| = -1 2/5
Do -1 and 2/5 divided by 2/5 to get -3.5, x > -3.5

One of the answers is x > -3.5 but you need to switch the sign to less than and make the other side the opposite.

$-( \frac{2}{5}x + 3 ) < 1 \frac{2}{5}$

You see that, switched the sign and made whats on the right side opposite. So now solve for x again but with this new equation. Also, the parentheses are absolute value signs

Subtract 3 from both sides

-|2/5x| < -1 and 3/5

Divide 2/5 from each side to get x < -4

I hope I'm correct, my bad if I'm wrong

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3 years ago

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Find the sum of the infinite geometric series: 1023 (0.25)-1 n=1 1,024 1 364 0 -1364 -1024

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Step-by-step explanation: I did the assignment

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3 years ago

Is 7x - 5 =2x + 8 true when x =2

svetlana [45]

Answer:

No its not true

Step-by-step explanation:

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4 years ago

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oee [108]

Answer:

(6, - 3 )

Step-by-step explanation:

Given the 2 equations

2x + 5y = - 3 → (1)

2x + 2y = 6 → (2)

Subtracting (1) from (2) term by term will eliminate the x- term

(2x - 2x) + (2y - 5y) = 6 - (- 3), that is

- 3y = 9 ( divide both sides by - 3 )

y = - 3

Substitute y = - 3 in either of the 2 equations and solve for x

Substituting y = - 3 in (1)

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