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Mrrafil [7]
3 years ago
8

Follow the steps to finish solving the equation -3x+ 18=7x

Mathematics
2 answers:
algol133 years ago
8 0

Answer:

Step-by-step explanation:

- 3x + 18 = 7x

- 3x + 3x + 18 = 7x + 3x ⇔ 18 = 10x

\frac{18}{10} = \frac{10x}{10} ⇔ 1.8 = x

x = 1.8

docker41 [41]3 years ago
3 0

Answer:

9/5=x

Step-by-step explanation:

-3x+ 18=7x

-3x+3x+ 18=7x +3x

18=10x

18/10=10x/10

9/5=x

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On monday it took 5 builders to 3 1/2 hours to build a wall
zubka84 [21]

Answer:   £ 81.38

Step-by-step explanation:

Given: On Monday,

5 builders took 3\dfrac{1}{2} hours  ( i.e. \dfrac{7}{2} hours )  to build a wall.

On Tuesday, only 2 builders were available.

As workers are inversely proportional to the time if the job remains constant.

Inverse variation equation : x_1y_1=x_2y_2

Let x be the time taken by 2 builders, then

2\times x =5\times \dfrac{7}{2}

\Rightarrow\ x=\dfrac{35}{2}\times\dfrac{1}{2}=\dfrac{35}{4}=8.75

So, 2 builders will take 8.75 hours.

Each paid  £9.30 for each hour.

Then, each builder will be paid for the work completed on Tuesday = £9.30 x  8.75

≈ £ 81.38

Hence, each builder will be paid £ 81.38 for the work completed on Tuesday .

5 0
4 years ago
Answer and explain how long is the surface of the slide
erica [24]

Answer:

13.9 ft

Step-by-step explanation:

use Pythagoras theorem

surface²=7²+12²

surface²=193

surface=√193=13.89 ft≈13.9 ft

please mark brainliest

6 0
3 years ago
Simplify: StartRoot StartFraction 27 x Superscript 12 Baseline Over 300 x Superscript 8 Baseline EndFraction EndRoot StartFracti
ale4655 [162]

The solution of the expression is \rm \dfrac{9\times x^4}{100}.

Given that

Equation; \dfrac{27x^{12}}{300x^8}

We have to simplify the equation.

According to the question

To simplify the equation follow all the steps given below.

Equation; \sqrt{\dfrac{27x^{12}}{300x^8}}

Then,

= {\dfrac{27x^{12}}{300x^8}}\\\\ = \dfrac{3\times 3\times 3 \times x^{8} \times x^{4}}{3 \times 100\times x^8}}\\\\=\dfrac{9\times x^4}{100}

Hence, the required expression is \rm \dfrac{9\times x^4}{100}.

To know more about Expression click the link given below.

brainly.com/question/16179118

8 0
3 years ago
What is the answer to this question in this photo
USPshnik [31]

Answer: -5x+6

Step-by-step explanation:

Find slope through slope formula (y₂-y₁)/(x₂-x₁)

  • By doing this you find that the slope is -5

Then the y-intercept is found through the intersection of the y-axis.

7 0
3 years ago
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SashulF [63]
-7v = -7(-8i - 7j)
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