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2 years ago

I need help on this question:

Mathematics

1 answer:

lara [203]2 years ago

6 0

2x+2x+7x+7x= 18x

18x= perimeter

a triangle has 3 sides

18x÷3=6x

one side of the triangle=6x

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The bottom end of a ramp at a warehouse is 10 feet from the base of the main dock and is 11 feet long.

Otrada [13]

Answer:

The dock is $4.58$ $ft$ high

Step-by-step explanation:

we know that

Applying the Pythagoras theorem

Let

x------> the height of the dock

$11^2=x^2+10^2$

Solve for x

$x^2=11^2-10^2$

$x^2=121-100$

$x^2=21$

$x=\sqrt{21}$ $ft$

$x=4.58$ $ft$

5 0

1 year ago

What is the value of x?

guajiro [1.7K]

Answer:

x ≈ 8.66

Step-by-step explanation:

Using the sine ratio in the right triangle

sin60° = $\frac{opposite}{hypotenuse}$ = $\frac{x}{10}$

Multiply both sides by 10

10 × sin60° = x, thus

x ≈ 8.66 ( to 2 dec. places )

4 0

3 years ago

Write 0.07131 correct to 3 decimal places

lesantik [10]

The first decimal place has the digit 0

the second decimal place has the digit 7

the third decimal place has the digit ....either 1 or 2.

this depends on the forth one, if it was 5 or higher, the third digit would be 2
since the fourth digit is 3, which is lower than 5, we don't have to change the third digit : it remains a "1"

so the answer is 0.071

6 0

2 years ago

Read 2 more answers

If y is directly proportional to x and if y = 20 when x = 6, what is the value of y when x = 9 ?

11Alexandr11 [23.1K]

E - 30. From 6 to 9 is increase of 1.5times

4 0

3 years ago

Helppppppp pleasssseeeeee

Svet_ta [14]

$14mi-5\frac{7}{10}mi=[(14-5)-\frac{7}{10}]mi=(9-\frac{7}{10})mi=(8+1-\frac{7}{10})mi\\\\=(8+\frac{10}{10}-\frac{7}{10})mi=(8+\frac{10-7}{10})mi=(8+\frac{3}{10})mi=\boxed{8\frac{3}{10}mi}\\\\other\ method\\\\14mi-5\frac{7}{10}mi=14mi-5.7mi=(14-5-0.7)mi\\\\=(9-0.7)mi=\boxed{8.3mi}$

6 0

2 years ago