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2 years ago

PLEASE HELP ME ASAP!!!!!????

Mathematics

1 answer:

Elan Coil [88]2 years ago

3 0

I think it’s number one ??????

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3[x + 3(4x – 5)] = 15x – 24

Alex17521 [72]

Answer:

$\boxed{ \bold{ \huge{ \boxed{ \sf{x = 0.875}}}}}$

Step-by-step explanation:

$\sf{3[ x + 3(4x - 5)] = 15x - 24}$

Distribute 3 through the parentheses

⇒ $\sf{3[ x + 12x - 15 ] = 15x - 24}$

Collect like terms : 12x and x

⇒ $\sf{3[ 13x - 15 ] = 15x - 24}$

Distribute 3 through the parentheses

⇒ $\sf{39x - 45 = 15x - 24}$

Move 15x to left hand side and change it's sign

Similarly, move 45 to right hand side and change it's sign

⇒ $\sf{39x - 15x = - 24 + 45}$

Collect like terms

⇒ $\sf{24x = - 24 + 45}$

Calculate

⇒ $\sf{24x = 21}$

Divide both sides of the equation by 24

⇒ $\sf{ \frac{24x}{24} = \frac{21}{24}}$

Calculate

⇒ $\sf{x = 0.875}$

Hope I helped!

Best regards! :D

5 0

3 years ago

(8x-17)(5x+19) Find the converse and x

pychu [463]

$(8x-17)(5x+19)\\40x^{2}+152x-85x-323\\ 40x^{2}+67x-323$

4 0

2 years ago

-9.6 + 6 1 1/2 + 2 1/4 + (3/4) -3 + 5 8.55 - 2.25 13 -(-5)

vodka [1.7K]

Answer:

−3.6

7.5

6.3

Step-by-step explanation:

Plug it into a calculator if they are not correct.

5 0

2 years ago

A circle has a diameter of 10 centimeters. of a sector with a central angle of 50 degrees is cut out, what is the area of this s

kramer

Answer:

D. 10.91 square centimeters

Step-by-step explanation:

Area of a sector of a circle = $\frac{\theta}{360}\\$ $\pi$ $r^{2}$

where $\theta = 50^{o} C$

radius (r) = half of diameter = 10/2 = 5 cm

Area = $\frac{50}{360} * \frac{22}{7} * 5^{2}$

= 10.91 $cm^{2}$

8 0

2 years ago

Question 12 1 pts If the population of a country is reported in the year 1990 as 471.56 million and in the year 2000 as 492.53 m

I am Lyosha [343]

Answer:

526.39 million

Step-by-step explanation:

The exponential equation can be written as ...

p(t) = 471.56(492.53/471.56)^(t/10)

Then p(25) ≈ 525.75 . . . . million

The closest answer choice is 526.39 million.

Comment on the answer choice

Reverse-engineering the answer, we find it was computed using the exponential equation ...

p(t) = 471.56e^(0.0044t)

p(25) = 471.56·1.116278 ≈ 526.39

The k factor in the exponent is inappropriately rounded from 0.004350903. You cannot use a 2-significant-figure constant to arrive at an accurate 5-significant-figure answer.

3 0

2 years ago