Solve the equation. Show your work.

1/a =6/18

Answers

Answer 1

Answer:
1 6
--- = ---
a 18

- simplify 6/18, which should be 1/3. therefore, a = 3.

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20% of 90, and i have to show workings out

Answers

10% of 90 is 9, 10% times 2 is 20%, therefore 20% of 90 is 2*10% of 90, or 18

It helps to know that 10% of anything is the number divided by 10. So 10% of 90 = 9. As it is 20% and not 10, just do it twice and add them together :) OR just times it by 2 which is much easier. So 9 x 2 = 18.

10% of a number is the number divided by 10.
5% of a number is the number divided by 10 THEN divided by 2.
1% of a number is the number divided by 100.

A sack contains red and blue marbles. The ratio of red marbles to blue marbles is 4:3. If there are 18 blue marbles in the sack, how many red marbles are in the sack?

Answers

$r:b=4:3 \n (r)/(b)= (4)/(3) \n (r)/(18)= (4)/(3) \n r= (18*4)/(3) \n r= 6*4 \n r=24 \ red \ marbles$

Find the greatest common factor (GCF) for 72, 36, and 24.

Answers

12

Working;
12 is a common factor for all the terms.

Check all that apply. cotθ is undefined for θ = _____. A. 3π/2 B. π/2 C. 0 D. π

Answers

The undefined value of $cot \theta = 0, \pi$ .

What are trigonometric ratios ?

"The six trigonometric ratios are sine (sin), cosine (cos), tangent (tan), cotangent (cot), cosecant (cosec), and secant (sec). In geometry, trigonometry is a branch of mathematics that deals with the sides and angles of a right-angled triangle. Therefore, trig ratios are evaluated with respect to sides and angles.

The six trigonometric ratios are sine (sin), cosine (cos), tangent (tan), cotangent (cot), cosecant (cosec), and secant (sec). In geometry, trigonometry is a branch of mathematics that deals with the sides and angles of a right-angled triangle. Therefore, trig ratios are evaluated with respect to sides and angles. "

The values of cot theta is undefined for $n\pi$ .

So, 0 , pi , 2pi , 3pi .....npi.

Hence C and D are correct option.

To know more about trigonometric ratios here

brainly.com/question/14746686

#SPJ3

cot theta is undefined for 0 but is a periodic function so it will be again undefined for n $\pi$

Which of the following is the value of 'm' in the equation 2m - 12 = 6?

Answers

Answer:

m = 9

Step-by-step explanation:

Given equation : 2m - 12 = 6

To calculate : value of m

$2m - 12 = 6$

Add 12 on both sides,

$2m - 12 + 12 = 6 + 12$

$2m = 18$

Divide both sides by 2,

$m = 9$

Hence the value of m is 9.

Solving equations

----------------------------------------------------

Let's solve the problem given to us today! The problem is :

$\mapsto\quad\bf{2m-12=6}$

We need to find the value of m by solving this equation.

-----------------------------------

In order to solve for m, begin by adding 12 to both sides:

$\mapsto\quad\bf{2m=18}$

Then, to get your answer, divide both sides by 2 :

$\mapsto\quad\bf{m=9}$

Therefore, m = 9.

Matrix Question PLEASE

Answers

make into matrix
$\left[\begin{array}{ccc}2&1&1\n1&-3&-1\n4&5&2\end{array}\right] = \left[\begin{array}{ccc}-2\n14\n-4\end{array}\right]$

accoring to cramer's rule
replace the y collum with eh constant collumn and find the detterminant

$\left[\begin{array}{ccc}2&-2&1\n1&-14&-1\n4&-4&2\end{array}\right]$
det
$2 \left[\begin{array}{ccc}14&-1\n-4&2\end{array}\right]-(-2) \left[\begin{array}{ccc}1&-1\n4&2\end{array}\right]+1 \left[\begin{array}{ccc}1&14\n4&-4\end{array}\right]$
dunno wat fraction is

pick last option

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