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2 years ago

- 2 + 5x - 7 = 3x – 9 + 2x

Mathematics

2 answers:

kiruha [24]2 years ago

7 0

Answer:

0 = 0

Step-by-step explanation:

2+5x−7=3x−9+2x

Step 1: Simplify both sides of the equation.

−2+5x−7=3x−9+2x

−2+5x+−7=3x+−9+2x

(5x)+(−2+−7)=(3x+2x)+(−9)(Combine Like Terms)

5x+−9=5x+−9

5x−9=5x−9

Step 2: Subtract 5x from both sides.

5x−9−5x=5x−9−5x

−9=−9

Step 3: Add 9 to both sides.

−9+9=−9+9

0=0

Art [367]2 years ago

4 0

Answer:

10x -18

Step-by-step explanation:

add the same things together

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2 years ago

Point C(3.6, -0.4) divides in the ratio 3 : 2. If the coordinates of A are (-6, 5), the coordinates of point B are .

Evgen [1.6K]

QUESTION 1

The point C(3.6, -0.4) divides AB in the ratio 3 : 2.

The coordinates of A are (-6, 5).

Let the coordinates of B be $(x_2,y_2)$

We use the formula:

$x=\frac{mx_2+nx_1}{m+n}$ to determine the x-coordinate of B.

We substitute the known values to obtain:

$3.6=\frac{3x_2+2(-6)}{3+2}$

$3.6=\frac{3x_2-12)}{5}$

$3.6\times 5=3x_2-12$

$18=3x_2-12$

$18+12=3x_2$

$30=3x_2$

This implies that:

$x_2=10$

We also use the formula:

$y=\frac{my_2+ny_1}{m+n}$ to find the y-coordinate.

$-0.4=\frac{3y_2+2(5)}{3+2}$

$-0.4=\frac{3y_2+10}{5}$

$-0.4\times 5=3y_2+10$

$-2-10=3y_2$

$-12=3y_2$

$-4=y_2$

The coordinates of B are (10,-4)

QUESTION 2.

If point D divides CD in the ratio 4 : 5.

Then the coordinates of D are:

$(\frac{4(10)+5(3.6)}{4+5}, \frac{4(-4)+5(-0.4)}{4+5})$

$(\frac{58}{9}, \frac{-18}{9})$

The coordinates of D are $(\frac{58}{9}, -2)$

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2 years ago

Convert 3upon4 in persentage: 1. 25% 2. 50% 3. 1% 4. 75%

Charra [1.4K]

Answer:

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Step-by-step explanation:

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2 years ago

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kherson [118]

Answer:

x = 1 $\frac{1}{4}$

Step-by-step explanation:

Expressing the diagram as an equation , that is

6x - 3 = 4 $\frac{1}{2}$ = $\frac{9}{2}$ ( multiply through by 2 to clear the fraction )

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12x = 15 ( divide both sides by 12 )

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2 years ago

HELP!!! this is factorising quadratic expressions which a does not equal 1

Sati [7]

Answer:

f(x) = (4x - 1)(2x + 1)

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Step-by-step explanation:

The given quadratic expression is 8x² - 2x - 3.

Now, the factorization of this quadratic expression gives:

f(x) = 8x² - 2x - 3

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Hence, the zeros of the function are $x = \frac{1}{4}$ and $x = - \frac{1}{2}$ . (Answer)

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3 years ago