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Alika [10]
3 years ago
5

Select the expression equivalent to (-2x + 8.1y) - (-9x + 5.3y).

Mathematics
1 answer:
makvit [3.9K]3 years ago
3 0
ANSWER
D.) 7x+2.8y

Hope this helped!
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Which is irrational?
sladkih [1.3K]

Answer:

  (b)  √5

Step-by-step explanation:

The square root of an integer is rational if the integer is a perfect square. You probably know the first few perfect square integers are 1, 4, 9, 16, 25, 36, ...

The integer 5 is not on that list, so its square root will be irrational.

  √5 is irrational

5 0
2 years ago
The ampitude/frequency/period of y=1/4cos1/2x is 4 pie
Fantom [35]
Amplitude: 1/4 (= |a|)
Frequency: 1/2 (= |b|)
Period: 4pi (= 2pi/|b|)
7 0
3 years ago
()+()+()+()+()=30
Iteru [2.4K]
<span>There are 5 boxes, where we have to put given numbers. Addition of 5 odd numbers always gives an odd number result. 30 is an even number. So there is no combination of given numbers which can give you 30 as a result. 
</span>
3 0
3 years ago
What is the volume of this container?
Ostrovityanka [42]

Answer:

105 feet cubed

Step-by-step explanation:

1/2 cubed is 0.125 Since there are 840 wooden blocks, .125x840 is 105 feet cubed

7 0
3 years ago
Find the solution of the system of equations.
avanturin [10]

Answer:

3

Step-by-step explanation:

The number is 3.

Step-by-step explanation:

Finding the Number

To find the number, we have to translate the problem above to an algebraic equation. The algebraic equation refers to the statement of the equality of two algebraic expressions.

Equation:

Let "x" be the number.

4 is divided by a number - 4/x

3 divided by the number decreased by 2 - 3/x-2

"4 is divided by a number is equal to 3 divided by the number decreased by 2"

4/x = 3/x-2

Solution:

Cross multiply.

4/x = 3/x-2

x(3) = 4(x-2)

3x = 4x - 8

(Combine similar terms.)

3x - 4x = - 8

- x = - 8

- x/- 1 = - 8/- 1

x = 8

Final Answer:

8

Checking:

4/x = 3/x-2

4/8 = 3/8-2

1/2 = 3/6

1/2 = 1/2 ✔

7 0
3 years ago
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