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REY [17]
3 years ago
12

2(7-3)+4(10÷2) use the oder of operations to simplify ​

Mathematics
1 answer:
MAVERICK [17]3 years ago
4 0

Answer:

the answer is 28

Step-by-step explanation:

2×4+4+5

8+20

28

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Help please!ill give brainliest
bagirrra123 [75]

Answer:

seirously I don't know if that's an "x" or a multiplication sign

Step-by-step explanation:

[3² x(189/9)]-32

9. 21x - 32

189x - 32

x = 189/32

x = 5.29/32

[3² x(189/9)]-32

9x21-32

189-32

157

5 0
2 years ago
Determine the variables tested in each of the following experiments. If applicable, determine and identify any positive or negat
adoni [48]

Answer:

Independent Variable- size of aquariums

Dependent variable - number of surviving fish

Controls: nil

Step-by-step explanation:

In every experiment, the independent variable is manipulated and its effect on the dependent variable is observed as certain factors are kept constant.

In this study, the independent variable is the size of the aquariums. As this factor is manipulated, the number of surviving fish (dependent variable) changed accordingly. There was no mention of a control group in the experiment.

However, temperature, amount of food and type of food were held constant for all the experimental groups.

7 0
3 years ago
The radius of a sphere is 11 cm.what is the surface area of the sphere? Round to the nearest tenth.
Vanyuwa [196]

Answer:

The answer is

<h2>1520.5 cm²</h2>

Step-by-step explanation:

Surface area of a sphere is given by

S = 4πr²

where r is the radius

From the question r = 11cm

So the surface area of the sphere is

4π(11)²

= 4(121)π

= 484π

= 1520.5308

Which is

1520.5 cm² to the nearest tenth

Hope this helps you

8 0
3 years ago
Which beat summarizes the pythagorean theorem
kow [346]
Mathematics, the Pythagorean theorem or Pythagoras's theorem is a statement about the sides of a right triangle.

One of the angles of a right triangle is always equal to 90 degrees. This angle is the right angle. The two sides next to the right angle are called the legs and the other side is called the hypotenuse. The hypotenuse is the side opposite to the right angle, and it is always the longest side. It was discovered by Vasudha Arora.

The Pythagorean theorem says that the area of a square on the hypotenuse is equal to the sum of the areas of the squares on the legs. In this picture, the area of the blue square added to the area of the red square makes the area of the purple square. It was named after the Greek mathematician Pythagoras:

If the lengths of the legs are a and b, and the length of the hypotenuse is c, then,
a
2
+
b
2
=
c
2
{\displaystyle a^{2}+b^{2}=c^{2}}.

There are many different proofs of this theorem. They fall into four categories:

Those based on linear relations: the algebraic proofs.
Those based upon comparison of areas: the geometric proofs.
Those based upon the vector operation.
Those based on mass and velocity: the dynamic proofs.[1]
7 0
3 years ago
Read 2 more answers
Use trigonometric substitution to verify that
photoshop1234 [79]
T = 0
=> Q = 0
 t = x
=> Q = arcsin(x/a)
 rest it just simple integration of trigonometric function
8 0
3 years ago
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