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3 years ago

What is the value of the expression x + (–y) when x = –3.8 and y = 1.7?

Mathematics

1 answer:

agasfer [191]3 years ago

6 0

-3.8 + 1.7 is just like 3.8 - 1.7 just adding a negative sign (-) to it. So, -3.8 + 1.7 = -2.1

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According to the 1993 World Almanac, the number of calories a person walking at 3 mph burns per minute depends on the persons we

zaharov [31]

150 pounds is your answer

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3 years ago

Find the value of x such that the area of a triangle whose vertices have coordinates (6, 5), (8, 2) and (x, 11) is 15 square uni

Serjik [45]

Answer:

$x =12\ or\ -8$

Step-by-step explanation:

Given

$(x_1,y_1) = (6,5)$

$(x_2,y_2) = (8,2)$

$(x_3,y_3) = (x,11)$

$Area = 15$

Required

Find x

The area is calculated as thus:

$Area = \frac{1}{2}|x_1(y_2 - y_3) + x_2(y_3 - y_1) + x_3(y_1 - y_2)|$

Substitute values

$15 = \frac{1}{2}|6*(2 - 11) + 8*(11 - 5) + x(5 - 2)|$

$15 = \frac{1}{2}|6*(-9) + 8*(6) + x(3)|$

$15 = \frac{1}{2}|-54 + 48 + 3x|$

$15 = \frac{1}{2}|-6 + 3x|$

Multiply through by 2

$2 * 15 = \frac{1}{2}|-6 + 3x| * 2$

$30 = |-6 + 3x|$

Remove absolute sign

$30 = -6 + 3x\ or\ -30 = -6 + 3x$

Add 6 to both sides

$36 = 3x\ or\ -24 = 3x$

Divide by 3

$12 = x\ or\ -8 = x$

$x =12\ or\ -8$

<em>So, the coordinates are (-8, 11) or (12,11)</em>

3 0

2 years ago

Which of the following are characteristics of the graph of the quadratic parent function

stich3 [128]

Answer:

Answer – A and B

A. It is a parabola

B. It is in quadrants I and II

The most simple quadratic function is y = x^2. The graph drawn for this function, y = x^2) is known as the graph of the quadratic parent function OR the parent function for parabolas. This graph has some few characteristics:

- It is the simplest parabola (Generally, the graph of any quadratic function is a parabola).

- It passes through the origin (0,0).

- It is contained in Quadrants I and II.

hope this helps!

8 0

2 years ago

If 4x = 64 then find the value of 12²x - 6

olga2289 [7]

Answer:

2298

Step-by-step explanation:

4x = 64

x = 64/4

x = 16

12²•16 -6

144•16 -6

2304 -6

2298

8 0

2 years ago

Read 2 more answers

How do i write a function rule for: 7 less than three fifths of b is a

Andrews [41]

Answer:

3/5B - 7 = A

Step-by-step explanation:

5 0

2 years ago