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3 years ago

Evaluate the following expression. 28 – 10 – 15 = 3 = and this is the order of operations

Mathematics

1 answer:

AlekseyPX3 years ago

4 0

Answer:

28 - 10 - 15 - 3

=> 18 - 15 - 3

=> 3 - 3

=> 0

Another way:

=> 28 - 10 - 15 - 3

=> 28 - 25 - 3

=> 28 - 28

=> 0

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1. The largest of 2 integers is one more than

Aleks [24]

The larger integer is 28.

I'm first going to call these 2 integers n and m, where n is the larger and m is the smaller. We can now write equations based on the information they gave us:

(equation 1) n + m = 37, which tells us that the sum of the integers is 37

(equation 2) n = 3m + 1, which tells us that the larger integer is one more than 3 times the smaller.

Now we can simultaneously solve these equations, and I'm going to do this by substituting in equation 2 into equation 1:

n + m = 37

(3m + 1) + m = 37

4m + 1 = 37

- 1

4m = 364

÷ 4

m = 9

Now that we know the smaller integer is 9, we can find the larger by using equation 1:

n + m = 37

n + 9 = 37

- 9

n = 28

I hope this helps!

5 0

3 years ago

Angle a and b are supplementary angles. If m a = (x – 40)0 and m b = (x + 20)0, find the value of x, m a and m b

serious [3.7K]

Answer:

∠ a = 60° , ∠ b = 120°

Step-by-step explanation:

Supplementary angles sum to 180° then

x - 40 + x + 20 = 180 , that is

2x - 20 = 180 ( add 20 to both sides )

2x = 200 ( divide both sides by 2 )

x = 100

Then

∠ a = x - 40 = 100 - 40 = 60°

∠ b = x + 20 = 100 + 20 = 120°

5 0

2 years ago

Read 2 more answers

When does the proportion form of newton's second law take the form of an equation?

Brrunno [24]

Newton's law of motion has three parts. The second of which states that the force needed to move an object is directly proportional to the acceleration of the motion. The proportion can be written as,
F = ka
where k is the constant of proportionality. This can be substituted with the mass of the object such that the equation would become.
F = ma
where F is force, m is mass, and a is acceleration.

8 0

3 years ago

A coin bank for donations for the protection of the reef contained Php 1,570. There were twice as many Php 5-coins as

kvasek [131]

Answer:

There are 144 Php 5-coins, 72 Php 10-coins and 130 Php-1 coins

Step-by-step explanation:

The amount of the coins in the coin bank = Php 1,570

The number of Php 5-coins = 2 × The number of Php 10-coins

The number of Php 5 coins = The number of Php 1-coins + 14

Let 'x' represent the number of Php-5 coins, let 'y' represent the number of Php 10-coins, and let 'z' represent the number of Php 1-coins, we get;

x = 2 × y...(1)

x = z + 14...(2)

5·x + 10·y + z = 1,570...(3)

From equation (1) equation (2), and equation three, we have;

y = x/2

z = x - 14

5·x + 10·x/2 + x - 14 = 1,570

11·x - 14 = 1,570

x = (1,570 + 14)/11 = 144

The number of Php 5-coins, x = 144

y = x/2

∴ y = 144/2 = 72

The number of Php 10-coins, y = 72

z = x - 14

∴ z = 144 - 14 = 130

The number of Php 1-coins, z = 130

6 0

3 years ago

NEED HELP ASAP!! WILL MARK BRAINLIEST TO THE RIGHT ANSWER!!

Usimov [2.4K]

For the first one :) x + 6, y - 10

6 0

3 years ago