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Mice21 [21]
2 years ago
13

Select difference of (8x2-3x3) - (2x2-5x3)

Mathematics
2 answers:
mylen [45]2 years ago
5 0
(8x2-3x3) - (2x2-5x3)
= (16-9)-(4-15)
=7-(-11)
=7+11
=18
storchak [24]2 years ago
5 0
(8x^2 - 3x^3) - (2x^2 - 5x^3)

= 8x^2 - 3x^3 - 2x^2 + 5x^3.

= 8x^2 - 2x^2 + 5x^3 - 3x^3.  Simplify together like terms.

= 6x^2 + 2x^3

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one leg of a right triangle is 6.4 cm long the length of the second leg is 3.5 cm what is the length of the hypotenuse rounded t
Valentin [98]

Answer:

7.3

Step-by-step explanation:

In order to find the hypotenuse, we just need to use the Pythagorean Theorem.

Remember, that this theorem only works for right triangles.

This theorem states that a^2+b^2=c^2

This is where a and b are legs of the triange, and c is the hypotenuse.

Knowing this, we can plug our values in.

6.4^2+3.5^2=c^2

Simplify.

41.344+12.25=c^2

53.594=c^2

Root both sides.

c=7.32 (about)

Round that to tenths.

c=7.3

3 0
2 years ago
Ques
ruslelena [56]
The answer is B. False
6 0
2 years ago
3. Emma said that when you multiply three negative decimals , the product will be positive . Use these numbers to answer the que
mina [271]

Using multiplication signal rules, it is found that:

A: Emma's statement is always false.

B: The result is always negative.

C: Emma's statement is always true.

The rule used for this exercise is as follows:

  • When two numbers of different signals are multiplied, the result is negative.
  • When two numbers have the same signal, the result is positive.

Part A:

  • Three numbers are multiplied, all negative.
  • The multiplication of the first two result in a positive number.
  • Then, this positive number is multiplied by a negative number, and the result will be negative, which mean that Emma's statement is always false.

Two examples are:

-2.5(-3.8)(-2) = 9.5(-2) = -19

-2.5(-2)(-0.7) = 5(-0.7) = -3.5

Part B:

The rule is that the result is always negative.

Part C:

  • The multiplication of the first two negative numbers result in a positive number.
  • Then, this positive number is multiplied by another positive number, and the result will be positive, which mean that Emma's statement is always true.

Two examples are:

-2.5(-3.8)(2) = 9.5(2) = 19

-2.5(-2)(0.7) = 5(0.7) = 3.5

A similar problem is given at brainly.com/question/24764960

5 0
2 years ago
What effect does a scale factor equal to 1 have on the dimensions of the image being scaled?
FromTheMoon [43]

The scale factor equal to 1 will have No Effect on the dimensions of the image being scaled .

In the question ,

it is given that ,

the scale factor is = 1.

we have to find the effect of change ;

we know that ,

when the value scale factor is greater than 1 , then dimensions of new image is larger than original .

when the value of scale factor is 1 , then there is no change in the dimensions of the image .

when the value of scale factor is less than 1 , then the dimensions of new image is smaller than the original .

Therefore , if the scale factor is 1 , then there is no change in the dimensions of the image .

Learn more about Scale Factor here

brainly.com/question/29545968

#SPJ4

4 0
1 year ago
What is the rounded amount 3.56- to the nearest dollar
Semenov [28]

Answer: $4.00

Step-by-step explanation: 56 ronded to to the nearest hundredths equal to 100. 1+3=4

8 0
3 years ago
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