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Westkost [7]
3 years ago
6

A number added to four is equal to three times the number​

Mathematics
1 answer:
Artyom0805 [142]3 years ago
4 0

Answer:

2

Step-by-step explanation:

x+4=3x

x-3x= -4

-2x=-4

Therefore, the number is 2.

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An element with mass 570 grams decays by 18% per minute. How much of the element is remaining after 13 minutes,to the nearest 10
miskamm [114]

Answer:

43.2 grams

Step-by-step explanation:

A = P (1 + r)^t

where A is the final amount,

P is the initial amount,

r is the rate of growth or decay,

and t is time.

Given:

P = 570

r = -0.18

t = 13

A = 570 (1 − 0.18)^13

A = 43.2

8 0
3 years ago
The square root of x minus two plus 8 equals x
FrozenT [24]

Step-by-step explanation:

\sqrt{x - 2 + 8}  =  \sqrt{x + 6}  = x

{( \sqrt{x + 6} })^{2}  =  {x}^{2}

x + 6 =  {x}^{2}

{x}^{2}  - x  -  6 = 0

(x - 3)(x + 2) = 0

x = 3 or x = -2 we dont use the (-2) because we have a sqrt

So x =3

6 0
3 years ago
10
motikmotik

9514 1404 393

Answer:

  • The are congruent.
  • They are non-adjacent.

Step-by-step explanation:

Where a transversal crosses parallel lines, the angles outside the parallel lines are called exterior angles. When they are on opposite sides of the transversal, they are <em>alternate exterior angles</em>.

Alternate exterior angles are congruent.

The share a side (the transversal, but not a vertex. So they are non-adjacent.

_____

<em>Additional comment</em>

In this geometry, <em>corresponding</em> angles are congruent. Of course, vertical angles are always congruent. Each alternate exterior angle is a vertical angle with one that is corresponding to the other alternate exterior angle.

5 0
3 years ago
Out of 1500 students at a school 85% made grade check. How many students passed grade check?
Elena-2011 [213]

Answer:

1275

Step-by-step explanation:

3 0
3 years ago
Solve for x. 9x/7= 18 x = -2 4/7 x = 2 4/7 x = 14
jeka94

Answer:

x=14

Step-by-step explanation:

8 0
4 years ago
Read 2 more answers
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