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trasher [3.6K]
3 years ago
12

Which expression represents the phrase "twice the difference of a number and 5"?

Mathematics
1 answer:
julsineya [31]3 years ago
3 0

Answer:

2 (1-5)

twice = 2 times

difference is subtraction

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If BH = 108, find DE.
TEA [102]

Answer:

BH= 108 --> 1st until 6th space

so, 108/6 = 18 for each space

DE...?

DE only use 1 space so the answers is 18 unit

I hope this helps^_^

7 0
3 years ago
The number of students in a chess club decreased from 17 to 10. What is
Svetllana [295]

Answer:

  • 41.18%

Step-by-step explanation:

  • Initial number = 17
  • Final number = 10

<u>Decrease in number:</u>

  • 17 - 10 = 7

<u>Percent decrease:</u>

  • 7/17*100% = 41.18% (rounded)
6 0
2 years ago
90° clockwise rotation<br> Help please
maria [59]

Answer:

E' (-2,5)

F' (-3,1)

G' (-2,-1)

H' (0,3)

Step-by-step explanation:

The rule for 90 degree clockwise rotation is (h,k) -> (k,-h). This means flip the x-value's sign and then switch x and y's position. For example E (-5,-2), first flip x's sign (5,-2) and then switch x and y's places (-2,5).

4 0
3 years ago
Help on this one. You will get 10 points
ad-work [718]

Answer:

A.true

Step-by-step explanation:

The domain of a quadratic function in standard form is always all real numbers, meaning you can substitute any real number for x. The range of a function is the set of all real values of y that you can get by plugging real numbers into x.

8 0
3 years ago
4x^2-2x-4=0 solve using quadratic formula
MArishka [77]

Answer:

Step-by-step explanation:

Although you can start with 4x^2-2x-4=0, it's just slightly easier to reduce the coefficients.  4x^2-2x-4=0 becomes 2x^2 - x - 2 = 0.

The discriminant (part of the quadratic formula) is b^2 - 4ac.  Using b = -1. a = 1 and c = -2, we get (-1)^2 - 4(2)(-2), or 17.

                                                       -b ± √(b^2 - 4ac)

Then the quadratic formula   x = ---------------------------

                                                                 2a

                                         -(-1) ± √17           1 ± √17

takes on the values  x = -----------------  =  ---------------

                                                  4                      4

4 0
3 years ago
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