3(2+4x)=−7x2 please give step by step and end with improper fraction as answer

Mathematics

2 answers:

aalyn [17]2 years ago

7 0

Answer:

3(2 + 4x) = -7*2

6 + 12x = -7 * 2

6 + 12x = -14

-6 - 6

12x = -20

/12 /12

x = -5/3

Step-by-step explanation:

SVETLANKA909090 [29]2 years ago

6 0

Answer:

$\frac{-5}{3}$

Step-by-step explanation:

3(2 + 4x) = -7 x 2 Distribute the 3

6 + 12x = -14 Subtract 6 from both sides of the equation

12x = -20 Divide both sides by 12

x = $\frac{-20}{12}$ Divide the top and the bottom of the fraction by 4

x = $\frac{-5}{3}$

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Find the value of (+328.62) – (+98.6). A. 230.02 B. 427.22 C. –427.22 D. –230.02

Jet001 [13]

Answer:

Option A - $(+328.62)-(+98.6)=230.02$

Step-by-step explanation:

We have given the expression $(+328.62)-(+98.6)$

We have to find the value of the expression ?

Solution :

Step 1 - Write the expression

$=(+328.62)-(+98.6)$

Step 2 - Applying symbol rule i.e. multiplication of positive into negative is always negative, $(-)(+)=(-)$

$=328.62-98.6$

Step 3 - Solve

$=230.02$

Therefore, The value of the expression is $(+328.62)-(+98.6)=230.02$

So, Option A is correct.

7 0

3 years ago

The partial factorization of x2 – 3x – 10 is modeled with algebra tiles. Which unit tiles are needed to complete the factorizati

baherus [9]

X² - 3x - 10

x² = x * x
10 can be factored:
1 x 10 ⇒⇒⇒ difference between factors = 9
2 x 5   ⇒⇒⇒ difference between factors = 3 ⇒ (The correct pair)

(x-5)(x+2) = x(x+2) - 5(x+2)
                 = x² + 2x - 5x - 10
                 = x² - 3x - 10

∴ x - 5 = 0 ⇒⇒⇒ x = 5
   x + 2 = 0 ⇒⇒⇒ x = -2

I have attached <span>algebra tiles for the given equation.</span>