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2 years ago

0.5 (x4 - 3) + 12 WILL MARK BRAINLEST PLEASEEE HURRYYYYY!!!!!!!!

1 answer:

8 0

0.5x^4+10.5 or 12.5 simplified is correct answer. Remove any grouping symbol such as brackets and parentheses by multiplying factors.

Use the exponent rule to remove grouping if the terms are containing exponents.

Combine the like terms by addition or subtraction.

Combine the constants.

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Create an expression without parentheses that is equivalent to 4(6x + x).

Vlad1618 [11]

A possible answer can be found using the distributive property:

4(6x + x) becomes 24x + 4x, which can then be simply died to 28x.

Either off these solutions will work, as they are both expressions equal to the original expression.

Hope this helps!

6 0

3 years ago

At a certain time of the day, a tree that is x meters tall casts a shadow that is x-49 meters long. If the distance from the top

nikklg [1K]

The height of the tree is 60 meters.

Explanation:

Let the height of the tree be x. The tree casts a shadow of $x-49$ meters and the distance from the top of the tree to the end of the shadow is $x+1$ meters.

The sides of the triangle are attached in the image below:

Using pythagoras theorem,

$x^{2}+(x-49)^{2}=(x+1)^{2}$

Expanding, we get,

$2 x^{2}-98 x+2401=x^{2}+2 x+1$

$2 x^{2}-98 x+2400=x^{2}+2 x$

$2 x^{2}-100 x+2400=x^{2}$

$x^{2}-100 x+2400=0$

Solving the equation using the quadratic formula $x=\frac{-b \pm \sqrt{b^{2}-4 a c}}{2 a}$ , we get,

$x=\frac{-(-100)\pm\sqrt{(-100)^{2}-4 \cdot 1 \cdot 2400}}{2 \cdot 1}$

Simplifying, we have,

$x=\frac{100\pm\sqrt{10000-9600}}{2}$

$x=\frac{100\pm\sqrt{400}}{2}$

$x=\frac{100\pm{20}}{2}$

Thus,

$x=\frac{100+20}{2} \\x=\frac{120}{2} \\x=60$ and $x=\frac{100-20}{2} \\x=\frac{80}{2} \\x=40$

where the value $x=40$ is not possible because substituting the value $x=40$ in $x-49$ results in negative solution. Which is not possible.

Hence, the value of x is 60.

Thus, The height of the tree is 60 meters.

7 0

3 years ago

What is one half as a decimal

iVinArrow [24]

One half as a decimal is .5

7 0

3 years ago

Read 2 more answers

Who is he heeeelp i really need help

olasank [31]

Answer:

Albert Einstein

Step-by-step explanation:

8 0

2 years ago

Read 2 more answers

HELP I DONT UNDERSTAND! SOMEONE EXPLAIN

aleksandr82 [10.1K]

Answer:

Step-by-step explanation:

if ethan jogged 13/3 of a mile (i converted it to an improper fraction) and chloe jogged 1 1/4 as much, thats basically just saying the same as ethan so 13/3, with an additional 1/4 of the distance ethan ran. so it would be 13/3+ 13/12, which is equal to 52/12+13/12, which is 65/12 unsimplified and 5 5/12 simplified

3 0

1 year ago