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ioda
2 years ago
15

Select all the expressions that hace a value of 28:

Mathematics
1 answer:
laila [671]2 years ago
5 0

Answer:

616/22 = 28

784/28 = 28

Step-by-step explanation:

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ASAP PLS!! i attached a link with a screenshot of the question. please give step by step!!!!! will mark brainliest :)
emmainna [20.7K]

Answer:

I found two different solutions. Hope one of them help!

1. x = -1/3 = -0.333

2. x = 5/2 = 2.500

Step-by-step explanation:

13 ± √ 289

  x  =    ——————

                     12

Can  √ 289 be simplified ?

Yes!   The prime factorization of  289   is

  17•17

To be able to remove something from under the radical, there have to be  2  instances of it (because we are taking a square i.e. second root).

√ 289   =  √ 17•17   =

               ±  17 • √ 1   =

               ±  17

So now we are looking at:

          x  =  ( 13 ± 17) / 12

Two real solutions:

x =(13+√289)/12=(13+17)/12= 2.500

or

x =(13-√289)/12=(13-17)/12= -0.333

Two solutions were found :

x = -1/3 = -0.333

x = 5/2 = 2.500

7 0
3 years ago
Jasmin has 50 marbles in a bag.20% of the marbles are blue.How many marbles are blue
Minchanka [31]
20% of 100 is 20. divide that by 2 to get 20% of 50. 20/2 is 10. 20% of 50 is 10. There are 10 blue marbles.

Hope it helped :)
Ali
6 0
3 years ago
Helpppppppppppppppppppp plsssss​
diamong [38]

Answer:

b

Step-by-step explanation:

5 0
3 years ago
49 is 35% of what number?
NNADVOKAT [17]
We write this like this:

49=35%x

and we want to find the x.

let's invert the sides:

35%x=49.


35 is equal to 0.35

0.35*x=49

and now we only divide both sides by 0.35:

x=140

so the answer is 140.

(aternatively we can do it through fractions:

35/100*x=49
divide both sides by 7:

5/100*x=7

simplify the first fraction
1/20*x=7

and multiply by 20:

x=140
4 0
3 years ago
Pre-image point N(6, -3) was dilated to point N'(2, -1). What was the scale factor used?
blagie [28]

Question 1

Let the scale factor be k.

Then, we have the mapping

N(6,-3)\to N'(6k,-3k)

This implies that:

(6k,-3k)=(2,-1)

We equate any corresponding component find the value of the scale factor k.

6k=2

k=\frac{2}{6}

k=\frac{1}{3}

Hence the scale factor is  \frac{1}{3}

Question 2:

The midpoint of any two points can be calculated using the formula;

(\frac{x_1+x_2}{2}, \frac{y_1+y_2}{2})

We want to find the midpoint of (-8, 5) and (2, -2).

(\frac{-8+2}{2}, \frac{5+-2}{2})

(\frac{-6}{2}, \frac{3}{2})

The midpoint is:

(-3, \frac{3}{2})

5 0
3 years ago
Read 2 more answers
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