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3 years ago

Help please please❤️❤️❤️❤️

Mathematics

1 answer:

Sunny_sXe [5.5K]3 years ago

3 0

Answer:

3221

Step-by-step explanation:

By using lcm method

2 12600

2 6300

2 3150

3 1575

3 525

5 175

5 35

7 7

$2^{3} \\3^{2}\\5^{2}\\7^{1}\\$

therefore the number is 3221

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Can someone plsssss help

Taya2010 [7]

Answer:

Step-by-step explanation:

a2 +b2 = c2

a2 + 9 2 = 15 2

a2 + 81 = 225

- 81 - 81

a2 = 144

a = 12

4 0

4 years ago

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Sophia spent 6,274 rand on her trip. she exchanged the rand she had left for u.s. Dollars. The exchange rate was 1 rand to$0.14.

vaieri [72.5K]

6274 Rand = $878.36 US dollars The exchange was 1 Rand for $0.14 US dollars so all you have to do is multiply 6274 by 0.14.

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3 years ago

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1 - 4 please help !!!!

dusya [7]

We can use the slope formula for each of these.

$\frac{y.2 - y.1}{x.2 - x.1} = m$

1. 5 - 1 / 4 - 2

4 / 2

The slope is 2, and it is rising because it is positive.

2. -5 - 0 / 3 - (-1)

-5 / 4

The slope is -5/4, and it is falling because it is negative.

3. 1 - 1 / -3 - 2

0 / -5

The slope is 0, and it is a horizontal line. The value of y is not changing per value of x.

4. -5 - 2 / -1 - (-1)

-7 / 0

Undefined

The slope is undefined because it fails the vertical line test.

3 0

4 years ago

Mai has a rectangular poster. The poster is 1.6 meters long and 1.2 meters wide.

dangina [55]

Answer:

19,200 cm^2.

Step-by-step explanation:

The area = 1.2 * 1.6 = 1.92 m^2.

There are 100 cm to 1 meter, so 1 square meter = 100^2 = 10,000 cm^2.

Therefore 1.92 m^2 = 10,000 * 1.92 = 19,200 cm^2.

7 0

3 years ago

Your friend Alex was solving the equation 2x^2+3x=20 and the work below. Tragically, she made an error in her work. First, expla

earnstyle [38]

Answer:

Her error is that For solving by Completing the square method.

She has not made the Coefficient of x² as 1.

Therefore,

$x=\dfrac{-3+13}{4}=\dfrac{10}{4}=2.5\ OR\ x=\dfrac{-3-13}{4}=\dfrac{-16}{4}=-4$

Step-by-step explanation:

Alex was solving the equation

$2x^{2}+3x=20$

She is solving for x by Completing the square method

Her error is that For solving by Completing the square method

First step is to make Coefficient of x² as 1 ( one )

She has not made the Coefficient of x² as 1

The Require steps for the equation by Completing the square method are

Step 1 : Given

$2x^{2}+3x-20=0$

Step 2: Divide the whole by 2 we get

$x^{2}+\dfrac{3}{2}x-10=0$

Step 3 : Add 10 to both side

$x^{2}+\dfrac{3}{2}x-10+10=0+10\\\\x^{2}+\dfrac{3}{2}x=10$

Step 4 : Add $(\dfrac{1}{2}coefficient\ of\ x)^{2}=\dfrac{9}{16}$ to both the side.

$x^{2}+\dfrac{3}{2}x+\dfrac{9}{16}=10+\dfrac{9}{16}\\\\x^{2}+2\times \dfrac{3}{4}x+(\dfrac{3}{4})^{2}=\dfrac{169}{16}$

Step 5 : We have A² + 2AB + B² = (A+B)²

$(x+\dfrac{3}{4})^{2}=\dfrac{169}{16}$

Step 6 : Taking Square root

$(x+\dfrac{3}{4})=\pm \sqrt{\dfrac{169}{16}}=\pm \dfrac{13}{4}$

Step 7 : Subtract $\dfrac{3}{4}$ both side

$x+\dfrac{3}{4}-\dfrac{3}{4}=-\dfrac{3}{4}\pm \sqrt{\dfrac{169}{16}}=\pm \dfrac{13}{4}\\\\x=-\dfrac{3}{4} \pm \dfrac{13}{4}$

Step 8 : Finally we get

$x=\dfrac{-3+13}{4}=\dfrac{10}{4}=2.5\ OR\ x=\dfrac{-3-13}{4}=\dfrac{-16}{4}=-4$

Therefore,

$x=\dfrac{-3+13}{4}=\dfrac{10}{4}=2.5\ OR\ x=\dfrac{-3-13}{4}=\dfrac{-16}{4}=-4$

5 0

3 years ago