Simplify negative 15.5 divided by 5. and pls tell me how to simplify and give a step by step explanation thanks!

Answers

Answer 1

Answer:

Answer:

The answer is -3.1, or 3 1/10.Since diving a negative and a positive equals a negative, your quotient will be negative. You can start by removing the 0.5, and divide 15 by 5 which is 3. Then with the 0.5 from -15.5, divide it by 5 and you get 0.1. 3 plus 0.1 is 3.1, and since it has to be negative, it's -3.1.

Step-by-step explanation:

i tried, have a nice day (:

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Using the quadratic formula to solve 2x^2 = 4x – 7, what are the values of x?

Answers

For this case we have the following quadratic equation:

$2x ^ 2 = 4x - 7$

Rewriting the equation we have:

$2x ^ 2 - 4x + 7 = 0$

From here, we have:

$a=2 b = -4c = 7$

Substituting values in the quadratic equation we have:

$x = (-b+/-√(b^2-4ac))/(2a)$

$x = (-(-4)+/-√((-4)^2-4(2)(7)))/(2(2))$

Rewriting the equation we have:

$x = (4+/-√(16-56))/(4)$

$x = (4+/-√(-40))/(4)$

$x = (4+/-√(-4*10))/(4)$

$x = (4+/-2i√(*10))/(4)$

$x = (2+/-i√(*10))/(2)$

Answer:

The values of x are given by:

$x = (2+i√(*10))/(2)$

$x = (2-i√(*10))/(2)$

Answer:

Is C.

Ccccccccccccccc

I need help solving this

Answers

The area of the triangle is 15*25*sin(30) = 187.5;

If the domain of the square root function f(x) is x<=7, which statement must be true?7 is subtracted from the x-term inside the radical.
The radical is multiplied by a negative number.
7 is added to the radical term.
The x-term inside the radical has a negative coefficient.

Answers

Consider the funcion $y=√(x)$ . The dmain of this function is $\ge 0$ and the range is $y\ge 0$ .

Now if $x\le 7$ you can calculate that

$x-7\le 0,\n 7-x\ge 0$

and the function $y=√(7-x)$ will have the domain $x\le 7$ (state this using that expression under the root is $\ge 0$ ).

As you can see the x-term inside the radical has a negative coefficient.

Answer: correct choice is D.

Correct answer is D.

The expression inside the radical must be greater than or equal to zero.

$x \leq 7\n0 \leq 7-x\n7-x \geq 0$

Therefore, the x-term inside the radical has a negative coefficient.

In the triangle below y=? Round to the nearest tenth

Answers

Answer:

51.3°

Step-by-step explanation:

Step 1: Use tan to find angle y

o = 10

a = 8

$tan()=(o)/(a) \ntan(y)=(10)/(8) \ny = tan^(-1) ((10)/(8))\ny = 51.3$

Therefore angle "y" is 51.3° rounded to the nearest tenth

One-half of a number is 1 more than one-third of the same number. What is the number?

Answers

Let the number be x,
(1/2)x=1+(1/3)x
Solving for x,
(1/2)x-(1/3)x=1+(1/3)x-(1/3)x
(1/2)x-(1/3)x=1
(1*3/6)x-(1*2/6)x=1
(3/6)x-(2/6)x=1
(1/6)x=1
6*(1/6)x=6*1
Therefore, x=6

(1/2)x = (1/3)x +1
-(1/3)x -(1/3)x

(1/6)x=1
*6 *6
x=6

And so x=6, or your number is 6

1:2 = 4:8 The product of both the means and the extremes is

2
4
8
16

Answers

Answer:

Cross Products Property of Proportions states that the product of the means is equal to the product of extremes.

i,e $a : b : : c : d$

Also, in the proportion the first (a) and the last terms(d) are called the extremes, whereas the second(b) and the third terms(c) are called the means.

Given the proportion:

$1 : 2 = 4 : 8$

First term = 1

Second term = 2

Third term = 4

Fourth term = 8

By definition;

The product of means = $1 * 8 = 8$

The product of extremes = $2 * 4 = 8$

Therefore, the product of both the means and the extremes is, 8

lets say you have x:y=z:t
the means are y and z
the extremes are x and t
we have
1:2=4:8
means=2 and 4
extrememes=1 and 8
product of means=2 times 4=8
the product of extremes=1 times 8=8

the answer is 8

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