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2 years ago

Simplify the expression.

Mathematics

1 answer:

natulia [17]2 years ago

6 0

Just subtract 6 from 18 and the answer is twelve 12.

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What is the product

cricket20 [7]

Answer:

$\left[\begin{array}{cc}6&18\\\end{array}\right]$

Step-by-step explanation:

To find the product of the matrices: $\left[\begin{array}{cc}4&2\\\end{array}\right]$ × $\left[\begin{array}{cc}-2&5\\7&-1\\\end{array}\right]$

Multiply rows of the first matrix by the columns of the second matrix.

(4 × (–2) + 2 × 7 4 × 5 + 2 × (–1))

After simplifying this, we get the product $\left[\begin{array}{cc}6&18\\\end{array}\right]$

Hence, $\left[\begin{array}{cc}4&2\\\end{array}\right]$ × $\left[\begin{array}{cc}-2&5\\7&-1\\\end{array}\right]$ = $\left[\begin{array}{cc}6&18\\\end{array}\right]$

6 0

2 years ago

billiards company is designing limited-edition billiard balls covered in 24-carat gold foil. The company needs to calculate how

kondor19780726 [428]

Answer: The surface area of the ball is 15.90 in².

Step-by-step explanation:

1. The ball is spherical, therefore to calculate its surface area, you must apply the formula for calculate the surface area of a sphere, which is:

$SA=4r^{2}\pi$

2. You can calculate the radius ( $r$ ) with the diameter given in the problem, as following:

$r=\frac{2.25in}{2}\\r=1.125in$

3. Substitute this value into the formula. Then, you obtain that the result is:

$SA=4(1.125)^{2}\pi\\SA=15.90in^{2}$

8 0

2 years ago

At a carnival Cody bought 15 tickets. If he used 6 tickets trying to win the ring toss game, what is the ratio of tickets he has

juin [17]

9:6 is the ratio of tickets he has to the tickets he has used.

5 0

2 years ago

Can someone help me solve this matrix

liraira [26]

Answer:

You cant add a negative number.

Step-by-step explanation:

If you add a negative number you will not have a full answer.

6 0

2 years ago

AD = 3x + 4 and CD = x + 6, what is the value of x?

lesantik [10]

Your answer would be x = 1.

The rules for a kite shape is that two pairs are of equal length, which means we can say that AD = CD and thus form an equation:

3x + 4 = x + 6
- x
2x + 4 = 6
- 4
2x = 2
÷ 2
x = 1

I hope this helps!

5 0

2 years ago