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gtnhenbr [62]
3 years ago
11

What is the value of x in the equation ex- y = 30, when y = 15?

Mathematics
1 answer:
Bumek [7]3 years ago
4 0

Answer:

x = 45

Step-by-step explanation:

Solution:

x - y = 30

x - 15 = 30   ( y = 15 given)

x = 30 + 15

Therefore, x = 45

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Use the commutative law of MULTIPLICATION to write an equivalent expression.<br><br> 9(x+5)
Arturiano [62]
The commutative property of multiplication is ab=ba
so
9(x+5)=(x+5)9
(note, some people on this site like to write x2 for x² but that's not how you math correctly., (x+5)9 doesn't mean (x+5)⁹, it means (x+5) times 9)
3 0
3 years ago
Suzan sees a bag of marbles, she grabs a handful at random. She has seen a bag containing four red marbles, four green ones, two
Rainbow [258]
The answer to this question would be: 85/99

In this question, Suzan is taking 8 marble from a bag containing 4 red marbles, 4 green ones, 2 white ones, and 2 purple ones. The total marble in the bag should be: 4+4+2+2= 12. The question is how much the probability to get <4 red marble. In this question, the green, white and purple is not specified so you can join them into not red group. It will be easier to find the probability of "have all the red one" which mean Suzan take 4 red marble and 4 not-red marble<span>

Ways to take 8 marble out of 12=12C5= 12!/4!8!= </span>495
Ways to take 4 red marble out of 4= 4C4= 1
Ways to take 4 not red marble out of 8= 8C4= 8!/4!4!= 70

Probability to <span>have all the red ones= 1*70/495= 14/99
</span>Then the probability does not have all the red ones= 99/99 - 14/99= 85/99
6 0
3 years ago
NEED HELP ASAP!!
Ganezh [65]

Answer:

graph 3 graph 1 graph 2 graph 4

6 0
3 years ago
given that the center of a circle is at point (-3,5) and that the radius of the circle is 6 units, write the the equation of the
Anika [276]
The equation of a cricle is 
(x-h)^{2}+(y-k)^{2}=r^{2}
h being the x coordinate of the given point and k being the y coordinate of the given point (r also being the radius). 

Now we have to plug the points into the equation 
(x--3)^{2} +(y-5)^{2} = 6^{2}
now just simplify the the equation
(x+3)^{2} +(y-5)^{2} = 36 
3 0
3 years ago
Cual es la respuesta de (x10+10y12) al cuadrado​
padilas [110]

Answer:

\mathrm{Expand}\:\left(x^{10}+10y^{12}\right)^2:\quad x^{20}+20x^{10}y^{12}+100y^{24}

Step-by-step explanation:

\left(x^{10}+10y^{12}\right)^2

\gray{\mathrm{Apply\:Perfect\:Square\:Formula}:\quad \left(a+b\right)^2=a^2+2ab+b^2}

\gray{a=x^{10},\:\:b=10y^{12}}

=\left(x^{10}\right)^2+2x^{10}\cdot \:10y^{12}+\left(10y^{12}\right)^2

\black{\mathrm{Simplify}\:\left(x^{10}\right)^2+2x^{10}\cdot \:10y^{12}+\left(10y^{12}\right)^2:}

\left(x^{10}\right)^2+2x^{10}\cdot \:10y^{12}+\left(10y^{12}\right)^2

\gray{\left(x^{10}\right)^2=x^{20}}

\gray{2x^{10}\cdot \:10y^{12}=20x^{10}y^{12}}

\gray{\left(10y^{12}\right)^2=100y^{24}}

=x^{20}+20x^{10}y^{12}+100y^{24}

6 0
3 years ago
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