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2 years ago

Solve. Explain the answer step-by-step.

2 answers:

8 0

Without using order of operations, the answer would be 2,338.8192. There are no parenthesis, so this answer is solved without order of operations

Amanda [17]2 years ago

8 0

Answer:

2338.82

Step-by-step explanation:

3^8 × 27.9 ÷ 78 - 8

3^8 × 279/10 × 1/78 - 8

3^8 × 93/10 × 1/26 - 8

(93 × 3^8)/260 - 8

(93 × 6561)/260 - 8

610173/260 - 8

(610173 - 2080)/260

608093/260

2338.8192 ≈ 2338.82

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Which of the following equations have exactly one solutions 19x + 18 = -19x +18

brilliants [131]

Answer:

there's only one equation listed, and it has one solution, which is 0

Step-by-step explanation:

7 0

3 years ago

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Help me on this one too please.

Kobotan [32]

The answer is B I did something like this before I believe that is the answer

4 0

3 years ago

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Here is Triangle A. Lin created a scaled copy of Triangle A with an area of 72 square units. C. What is the length of bottom sid

satela [25.4K]

Answer:

The length of bottom side of the scaled copy is 12 u

Step-by-step explanation:

To solve this problem we have to know that to calculate the area of a triangle we use the following formula

a = area

b = base

h = height

a = b * h

In the triangle A the base and the height are equal to 3

b = h

Now that we know that b & h we can calculate the base of the scaled copy

72 u² = b * b

72 u² = (b)²

√(72 u²) = b

12 u = b

The length of bottom side of the scaled copy is 12 u

6 0

3 years ago

Show all work to solve the equation for x. If a solution is extraneous, be sure to identify it in your final answer.

IRISSAK [1]

Answer:

There is one extraneous solution at $x = 4$

The only solution is $x=7$

Step-by-step explanation:

Given:

The equation to solve is given as:

$\sqrt{x-3}+5=x$

In order to solve, we will first isolate the radical part.

<em>Adding -5 on both the sides, we get:</em>

$\sqrt{x-3}+5-5=x-5\\\sqrt{x-3}=x-5$

<em>Now, squaring both the sides, we get:</em>

$(\sqrt{x-3})^2=(x-5)^2\\\\x-3=x^2+25-10x\\\\x^2-10x-x+25+3=0\\\\x^2-11x+28=0\\\\(x-4)(x-7)=0\\\\x=4\ or\ x=7$

Now, let us check whether the calculated values satisfy the equations or not.

Plug in 4 and 7 for 'x' and check the value of the equation.

At $x=4$ ,

$\sqrt{4-3}+5=4\\\sqrt1+5=4\\1+5=4\\6=4$

But, 6 is not equal to 4 and hence 4 is not a solution to the given equation. It is an extraneous solution for the given equation.

Now, at $x=7$

$\sqrt{7-3}+5=7\\\sqrt4+5=7\\2+5=7\\7=7(True)$

Therefore, $x=7$ is a solution to the equation.

Hence, there is one extraneous solution at $x = 4$

The only solution is $x=7$

6 0

4 years ago

Tamara earns her living as a salary plus commission employee. Her annual salary is $48,000, and she earns 4% commission on all s

aleksklad [387]

Answer: b is the correct option

Step-by-step explanation:

Tamara earns her living as a salary plus commission employee. This means that the total amount she earns is not fixed.

Her annual salary is $48,000. There are 12 months in a year. This means

that her her monthly salary is 48000/12 = $4000

she earns 4% commission on all sales she makes.

If Tamara wants to make a total of $6,000 this month, it means that she wants to make an extra $2000($6000-$4000) this month. She can only make this from commission based on sales

Let the sales be x

4% of x = 2000

4/100 × x = 2000

0.04x = 2000

x= 2000/0.04 = $50000

5 0

3 years ago

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