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3 years ago

Solve: 2/3 x - 4 = -2 A) -3 B) -4 C) -9 D) 3

Mathematics

2 answers:

Mumz [18]3 years ago

5 0

Answer: x = 3

Step-by-step explanation: First, isolate the x term by adding 4 to

both sides of the equation. We get 2/3x = 2.

Next, multiply both sides of the equation by the

reciprocal of 2/3 which is 3/2 to get x by itself.

So we have (3/2) 2/3x = 2 (3/2).

On the left, (3/2) 2/3 cancels and we have x.

On the right, the 2's cancel and we have 3.

So x = 3 is our answer.

Lynna [10]3 years ago

4 0

D. x=3

2/3 x 3/1 = 6/3 or 2. 2-4= -2

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katrin2010 [14]

Answer:

Step-by-step explanation:

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3 years ago

I need help with 1-3 i don’t understand that problems and its already over due

Nina [5.8K]

Step-by-step explanation:

For a quadratic equation y = ax² + bx + c, the vertex (the maximum or minimum point) is at x = -b/(2a).

1) y = -0.5t² + 2t + 38

The maximum is at:

t = -2 / (2 × -0.5)

t = 2

The maximum height is:

y = -0.5(2)² + 2(2) + 38

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The coordinates of the vertex are (2, 40). That means the missile reaches a maximum height of 40 km after 2 minutes.

2) y = -4.9t² + 12t + 1.6

The maximum is at:

t = -12 / (2 × -4.9)

t = 1.22

The maximum height is:

y = -4.9(1.22)² + 12(1.22) + 1.6

y = 8.95

The coordinates of the vertex are (1.22, 8.95). That means the missile reaches a maximum height of 8.95 m after 1.22 seconds.

3) y = -0.04x² + 0.88x

The maximum is at:

x = -0.88 / (2 × -0.04)

x = 11

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y = -0.04(11)² + 0.88(11)

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The maximum height of the tunnel is 4.84 meters.

The maximum width is when y = 0.

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7 0

4 years ago

Consider that the length of rectangle A is 10 cm and its width is 6 cm. Which rectangle is similar to rectangle A? A) A rectangl

HACTEHA [7]

ANSWER

B) A rectangle with a length of 15 cm and a width of 9 cm.

EXPLANATION

The given rectangle, A, has length, 10cm and its width is 6cm.

The rectangle that is similar to rectangle A, has the corresponding sides in the same proportion.

For option A, the triangle has length 9cm and width 6cm.

The ratio of the corresponding sides are:

$\frac{10}{9} \ne \frac{6}{6}$

Since the ratios are not equal, the two triangles are not similar.

For the triangle in option B, the length is 15cm and the width is 9cm.

The ratio of the corresponding sides are:

$\frac{10}{15} = \frac{6}{9} = \frac{2}{3}$

Since the sides of the triangle are in the same proportion, the two triangles are similar.

For option C, the proportions are not the same.

$\frac{10}{14} \ne \frac{6}{7}$

The proportions are not the same for the triangle in option D.

$\frac{10}{12} \ne \frac{6}{8}$

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3 years ago

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My name is Ann [436]

Answer:C

Step-by-step explanation:

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3 years ago

Please Answer ASAP <br> Math Question

MArishka [77]

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4 years ago