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3 years ago

Which of the following is a true statement?

1 answer:

6 0

We need to find a expression that is true. Let's try out every one of them until we get a right answer.

If n + 14 = -15 then n = -1.07143

Replace n with -1.07143.

-1.07143 + 14 = 12.92857

12.92857 does not equal 15.

So, the first option is incorrect.

If 14 + n = -15, then n = -1

Replace n with -1

14 + (-1) = 13

13 is not equal to -15.

If 14 + n = -15, then n = -29.0

Replace n with -29.0

-29.0 + 14 = -15

This expression is indeed true.

So, the answer to this question is C If 14 + n = -15, then n = -29.0

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Using the technique in the model above, find the missing sides in this 30°-60°-90° triangle.

lina2011 [118]

For this case what you should do is use the following trigonometric relationship:
sin (x) = C.O / h
Where
x: angle
C.O: opposite leg
h: hypotenuse
Substituting the values we have:
sen (60) = long / h
sen (60) = 3 / h
h = 3 / sin (60)
h = 3.46
Answer:
h = 3.46

7 0

3 years ago

Read 2 more answers

What is the value of C in the matrix equation below?

lara [203]

Given:

The matrix equation is:

$\begin{bmatrix}-18&3&5\end{bmatrix}-C=\begin{bmatrix}-22&1&12\end{bmatrix}$

To find:

The value of matrix C.

Solution:

Let $A=\begin{bmatrix}-18&3&5\end{bmatrix},B=\begin{bmatrix}-22&1&12\end{bmatrix}$ . Then the given equation can be rewritten as

$A-C=B$

$-C=B-A$

$C=-(B-A)$

$C=A-B$

On substituting the values of the matrices, we get

$C=\begin{bmatrix}-18&3&5\end{bmatrix}-\begin{bmatrix}-22&1&12\end{bmatrix}$

$C=\begin{bmatrix}-18-(-22)&3-1&5-12\end{bmatrix}$

$C=\begin{bmatrix}-18+22&2&-7\end{bmatrix}$

$C=\begin{bmatrix}-4&2&-7\end{bmatrix}$

Therefore, the correct option is C.

6 0

2 years ago

Read 2 more answers

HELP MEH Please write the coordinates of the x-intercept: y = 500

zaharov [31]

Well, there needs to be an equation.

4 0

3 years ago

Read 2 more answers

Maths giving 10 point asap 1 question only

erik [133]

Answer:

Price of shirt=RM9.8

Step-by-step explanation:

Shirt=x Trouser=y

x+y=RM20

5x+y=RM59.20

y=20-x

5x+20-x=59.20

4x=39.20

x=9.8

y=20-9.8

y=10.2

4 0

2 years ago

True or false: Two lines with undefined slopes are parallel to each other and parallel to the y axis

BlackZzzverrR [31]

Correct! lines that have undefined slopes are always parallel to the y-axis as the change in x is 0. A gradient is calculated by the change in y divided by the change in x and anything divided by 0 is referred to as undefined.

$\frac{y_{1}- y_{2} }{x_{1}- x_{2} }$

(calculation for a gradient)

Hope that helps sorry if its a bit confusing :)

5 0

2 years ago