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stellarik [79]
2 years ago
8

Can u help me find the awnser using only one decimal place

Mathematics
1 answer:
SVETLANKA909090 [29]2 years ago
6 0

Answer:

5 km

Step-by-step explanation:

think of it like a triangle. use pythagorean theorem. 3^2 + 4^2 = x^2

9 + 16 = x^2

25 = x^2

5=x

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this means that the blue dot is 20
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Is the open sentence 8 - 4x = 4x true or false when x=0
kvasek [131]

It is not true because if you add in 0 the equation would be 8-4(0)=4(0)

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The length of a rectangle is 3 centimeters less than four times its width. Its area is 10 square centimeters. Find the dimension
Kay [80]

Answer:

W = 2 cm

L = 5 cm

Step-by-step explanation:

A rectangle is a four sided shape with 4 perpendicular angles. It has two pairs of parallel sides which are equal in distance: width and length. Its area, the amount of space inside it, can be found using the formula A = l*w. If the area is 10 cm² and the length is "3 cm less than 4 times the width" or 4w - 3, you can substitute and solve for w.

A = l*w

10 = (4w - 3)(w)

10 = 4w² - 3w

Subtract 10 from both sides to make the equation equal to 0. Then solve the quadratic by quadratic formula.

4w² - 3w - 10 = 0

Substitute a = 4, b = -3 and c = -10.

w = \frac{3 +/- \sqrt{(-3)^2 - 4(4)(-10)} }{2(4)} = \frac{3 +/- \sqrt{9 +160)} }{8} =  \frac{3 +/- \sqrt{169} }{8} = \frac{3+/-13}{8}

There are two possible solutions which can be found.

3 + 13 / 8 = 16/ 8 = 2

3 - 13 / 8 = -10/8 = -5/4

Since w is a side length or distance, it must be positive so w = 2 cm.

If the width is 2 cm then the length is 4(2) - 3 = 8 - 3 = 5 cm.

8 0
3 years ago
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Gennadij [26K]

Answer:

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Step-by-step explanation:

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dsp73

Answer:

the answer is 2

Step-by-step explanation:

3 0
3 years ago
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