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3 years ago

-.75X-2 = .25x What is x

Mathematics

1 answer:

a_sh-v [17]3 years ago

6 0

Answer:

x = -2

Step-by-step explanation:

Add 0.75x to both sides of the equation.

-0.75x -2 = 0.25x . . . . . given

-0.75x +0.75x -2 = 0.25x +0.75x

-2 = 1.00x . . . . simplify

x = -2

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Komok [63]

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Step-by-step explanation:

Step 1. Find the constant speed

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4 years ago

What is the answer to factor -8 out of -32d + 56

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Answer: -8(4d-7)

Step-by-step explanation:

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3 years ago

An arithmetic sequence has t1 = 3, t2 = 10. Find tn, Sn.

Softa [21]

Answer:

see explanation

Step-by-step explanation:

the n th term of an arithmetic sequence is

$t_{n}$ = $t_{1}$ + (n - 1)d

given $t_{1}$ = 3 and $t_{2}$ = 10, then

$t_{2}$ = 3 + d = 10 ⇒ d = 10 - 3 = 7

$t_{n}$ = 3 + 7(n - 1) = 3 + 7n - 7 = 7n - 4

the sum to n terms of an arithmetic sequence is

$S_{n}$ = $\frac{n}{2}$ [2 $t_{1}$ + (n - 1)d ]

= $\frac{n}{2}$ [(2 × 3) + 7(n - 1) ]

= $\frac{n}{2}$ (6 + 7n - 7 )

= $\frac{n}{2}$ (7n - 1)

= $\frac{7}{2}$ n² - $\frac{1}{2}$ n

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3 years ago

Which expressions are equivalent to 4^3 x 4^-5? Choose all answers that are correct. A) 4^-2 B) 1/16 C) 4^-15 D) 0.0625 E) 16^-1

astraxan [27]

The given expression is

$4^3 * 4^{-5}$

Here we have to use the product rule of exponent, according to which in case of multiplication, we have to add the exponents, that is

$4^3 * 4^{-5} = 4^{3-5} = 4^{-2}$

So out of the given options, correct option is A .

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3 years ago