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3 years ago

13

okay this makes 0 sense... Show how you can solve the equation 3x=9 by multiplying each side by the reciprocal of 3... need to b

e the full steps pls

1 answer:

Allisa [31]3 years ago

7 0

Answer:

x=3

Step-by-step explanation:

3x=9

Divide both sides by 3 and you get 1x=3 or basically x=3.

So the answer would be x=3.

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How are radicals and rational exponents related?

icang [17]

Answer:

Any radical in the form can be written using a fractional exponent in the form . The relationship between and works for rational exponents that have a numerator of 1 as well. For example, the radical can also be written as , since any number remains the same value if it is raised to the first power.

Step-by-step explanation:

8 0

3 years ago

Dad’s truck is 15 feet long. The trailer it tows is 40% longer the truck. How long the trailer?

elena-14-01-66 [18.8K]

Answer:

21 Feet Long

Step-by-step explanation:

You just reverse how you find a percentage.

1) 40 / 100 = .40

2) .40 * 15 = 6

3) 6 + 15 = 21

I did it this way because I need to find what 40% is to 15. But the trailer isn't 40% of the truck, it's 40% longer than the truck. So, we must add those 2 numbers together getting 21 Ft.

3 0

3 years ago

Read 2 more answers

frosja888 [35]

I don’t know if this is right but the way I did it I got 7.5

3 0

3 years ago

Read 2 more answers

Please please help! :)

weqwewe [10]

Answer:

∠ 2 = 140°

Step-by-step explanation:

the left base angle in the triangle and 110° are a linear pair and sum to 180°

base angle + 110° = 180° ( subtract 110° from both sides )

base angle = 70°

the 2 sides of the triangle are congruent so Δ is isosceles with base angles congruent.

the vertex of the Δ is then

(180 - 70 - 70)° = 180° - 140° = 40°

the vertex and ∠ 2 are a linear pair and sum to 180° , that is

∠ 2 + 40° = 180° ( subtract 40° from both sides )

∠ 2 = 140°

8 0

1 year ago

The sides of a triangle are x,x+1,2x-1 and its area is x root 10. Find the value of x

Marianna [84]

<span>You can use Heron's formula to solve this problem.

</span> $A= \sqrt{s(s-a)(s-b)(s-c)}$ , where A is the area; a,b,с are the sides; s<span> is the </span>semiperimeter<span> of the triangle
</span> $s= \frac{a+b+c}{2}$

<span>According to conditions:
</span>a = x
b = x+1
с = 2x-1

<span>Calculate the semiperimeter:
</span> $s= \frac{x+x+1+2x-1}{2} = \frac{4x}{2}=2x$

<span>Now we can compose and solve the equation according to Heron's formula:
</span> $\sqrt{2x(2x-x)(2x-(x+1))(2x-(2x-1))}=x \sqrt{10} \\ \sqrt{2x(x)(2x-x-1)(2x-2x+1)}=x \sqrt{10} \\ \sqrt{2x^2(x-1)(1)}=x \sqrt{10} \\ \sqrt{2x^3-2x^2}=x \sqrt{10} \ \ \ |()^2 \\ 2x^3-2x^2=10x^2 \\ 2x^3-2x^2-10x^2=0 \\ 2x^3-12x^2=0 \ \ |:2 \\ x^3-6x^2=0 \\ x^2(x-6)=0 \\ \\ x^2=0 \\ x=0 \ \ \ \O \\ or \\ x-6=0 \\ x=6$

<span>As a result, x = 6 is your answer.

I hope this helped.</span>

7 0

3 years ago