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3 years ago

Plz help will give brainliest!

Mathematics

1 answer:

natita [175]3 years ago

4 0

Answer:

8.7

Step-by-step explanation:

You might be interested in

What is the product of 2r2 - 5 and 3r

faust18 [17]

Answer: 6r^3 - 15r

Step-by-step explanation:

(3r) (2r^2 - 5)

Distribute.

6r^3 - 15r

Hope this helped.

8 0

3 years ago

The top of the cylindrical can shown below has a diameter of 7 centimeters (cm).

Sidana [21]

Answer:

Circumference of the can is 21.98 cm.

Step-by-step explanation:

Since, top of the cylinder can shown in the figure is in the shape of a circle

Circumference of a circle is given by the formula,

Circumference 'C' = π × Diameter

Where r = radius of the circle

Therefore, circumference of a circle with diameter 7 centimeters will be,

C = 7π

= 7 × 3.14

= 21.98 cm

Therefore, circumference of the can is 21.98 cm.

5 0

3 years ago

Rosc has $500 in her savings account. She carnis simple interest at 5%

Firlakuza [10]

Answer:

Step-by-step explanation:

I assume you are asking how much she EARNS after 2 years.

500x.-5=25 interest per year

25 x 2 years = 50 interest for 2 years.

5 0

3 years ago

Suppose two dice (one red, one green) are rolled. Consider the following events. A: the red die shows 1; B: the numbers add to 4

kirill115 [55]

Answer: Third option is correct.

Step-by-step explanation:

Since we have given by

Event A: the red die shows 1

Event B : the numbers add to 4

Event C: at least one of the numbers is 3

Event D : the numbers do not add to 9.

D' means the number add to 9.

We need to write the following statement in symbolic form:

Either the numbers add to 9 or the red die shows a 1.

So, it becomes,

$D'\cup A$

Number of elements in D'∪A = 1.

Hence, Third option is correct.

5 0

3 years ago

Use the matrix tool to solve the system of equations. Enter the answer as an

BARSIC [14]

Answer:

$x=\frac{1}{4}$

$y=-2$

Step-by-step explanation:

Given:

$8x + y = 0$

$4x-y=3$

Convert your equation into matrices form

$\begin{bmatrix}8&1&0\\4&-1&3\end{bmatrix}$

Solve using reduced row reduction (RREF)

$\begin{bmatrix}8&1&0\\4&-1&3\end{bmatrix}$

$\begin{bmatrix}8&1&0\\8&-2&6\end{bmatrix}$

$\begin{bmatrix}8&1&0\\0&-3&6\end{bmatrix}$

$\begin{bmatrix}8&1&0\\0&-1&2\end{bmatrix}$

$\begin{bmatrix}8&0&2\\0&-1&2\end{bmatrix}$

$\begin{bmatrix}1&0&\frac{2}{8}\\0&1&-2\end{bmatrix}$

$\begin{bmatrix}1&0&\frac{1}{4}\\0&1&-2\end{bmatrix}$

$x=\frac{1}{4}$

$y=-2$

4 0

3 years ago