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3 years ago

The root of the equation z + 4 = -8 is

Mathematics

1 answer:

tangare [24]3 years ago

3 0

Answer:

z = -12

Step-by-step explanation:

z + 4 = -8

so, z = -8 - 4

z = -12

I think this is the answer, hope it helps.

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Evaluate (−25)(38)/(−34).

muminat

Multiply 25 and 38, the divide that by 34.
the negatives will cancel because there is 1 on the top and 1 on the bottom.
i got 27.9412

8 0

3 years ago

Consider a game in which you flip a coin. If it comes up heads, you earn 1 point; if it comes up tails, you earn 0 points. What

Sergeeva-Olga [200]

Answer:

C. 0.5

Step-by-step explanation:

Since a coin has 2 sides and there is the same probability of getting either side, then each side has a 50% or 0.5 probability. Therefore, in order to calculate the expected value of one coin flip we need to multiply the value of each side by its probability and add those values together like so...

1 * 0.5 = 0.5

0 * 0.5 = 0

Now we add these values together...

0.5 + 0 = 0.5

Finally, we can see that the expected value of one coin flip is 0.5

4 0

3 years ago

Twenty toothpicks, each 6 cm long, form a figure consisting of six equilateral triangles and a rectangle as shown. What is the t

Roman55 [17]

The total area of the figure is 139.20 square centimeters

Areas

The area of a shape is the amount of space it occupies

<h3>Composite figure</h3>

The figure (see attachment) is a composite figure, and the total area is the sum of the areas of each shape that makes up the complete figure

The shape has 6 equilateral triangles, each of which has an area of:

$A_1 = \sqrt{\frac{3s^2}{4}}$

Where:

$s = 6$ --- the length of each toothpick

The area of the rectangle is then represented as:

$A_2 =3s \times s$

$A_2 =3s^2$

So, the total area of the figure is:

$Total = 6A_1 + A_2$

This gives

$Total =6 \times \sqrt{\frac{3s^2}{4}} + 3s^2$

Substitute 6 for s

$Total =6 \times \sqrt{\frac{3(6)^2}{4}} + 3(6)^2$

$Total =6 \times \sqrt{27} + 108$

$Total =6 \times 5.20+ 108$

$Total =139.20$

Hence, the total area of the figure is 139.20 square centimeters

Read more about areas at:

brainly.com/question/21135654

7 0

2 years ago

Mariyam wants to cut her chocolate brownie into two rectangles. What kind of angles will Mariyam form?

Cerrena [4.2K]

Answer:

90°

Step-by-step explanation:

Given - Mariyam wants to cut her chocolate brownie into two rectangles.

To find - What kind of angles will Mariyam form?

Proof -

If she cut the brownie in the rectangular shape, then the angle formed is 90°.

4 0

3 years ago

A circle with circumference 6 has an arc with a 20 central angle,<br> What is the length of the arc?

nirvana33 [79]

Answer:

0.3 units

Step-by-step explanation:

The ratio of the length of the arc to the circumference of the circle is proportional to the ratio of the central angle to the sum of angle in a circle.

$\frac{l}{6}=\frac{20}{360}$

This implies that:

$l=\frac{20}{360}*6$

This simplifies to: $l=\frac{20}{60}$

$l=\frac{1}{3}=0.3 units$

8 0

3 years ago

Read 2 more answers