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lana66690 [7]
3 years ago
10

This is a solving system of equations with the elimanaton method pls help

Mathematics
1 answer:
a_sh-v [17]3 years ago
8 0

Answer:

<h2>x = 9 and y = 5</h2>

Step-by-step explanation:

\underline{+\left\{\begin{array}{ccc}-4x+9y=9\\3x-9y=-18\end{array}\right}\qquad\text{add both sides of the equations}\\.\qquad-x=-9\qquad\text{chnge the signs}\\.\qquad\boxed{x=9}\\\\\text{Put the value of x to the first equation.}\\\\-4(9)+9y=9\\-36+9y=9\qquad\text{add 36 to both sides}\\9y=45\qquad\text{divide both sides by 9}\\\boxed{y=5}

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99. What is the greatest prime factor of 5,355?<br> A. 17<br> B. 51<br> C. 119<br> D. 131<br> E. 153
NemiM [27]
Hello,

5355 is divisble by 3 since 5+3+5+5=18 is divisible by 3
5355=3*1785
1785 is divisble by 3 since 1+7+8+5=21 is divisible by 3
1785=3*595
595 is not divisible by 3 but by 5
595=5*119
119 is divisible by 7 since 1*2+1*3+9*1=14 is divisible by 7.
119=7*17

17 is prime
Answer A



8 0
3 years ago
Is b+b+b+c+c+c is a equivalent expression?<br> A. True <br> B. False
Rama09 [41]

Answer:

A. True

Step-by-step explanation:

......................................................................................

5 0
3 years ago
Please please pleaseee
kaheart [24]

Answer:

a. C= 5/9(F-32)

Step-by-step explanation:

you have to subtract 32 from both sides so that leaves you with f-32=9/5c and so then you need to multipy each side my 5/9 and that leaves yoh with 5/9(f-32)=c

7 0
3 years ago
A text font fits 12 characters per inch. Using the same font, how many characters can be expected per yard of text?
Radda [10]
The answer is 432 characters
8 0
4 years ago
The endpoints of CD are C(−4, 7) and D(0,−3).
tino4ka555 [31]

Midpoint =(\frac{x_{2}+x_{1}}{2},\frac{y_{2}+y_{1}}{2})

Answer:

Midpoints of line CD are (-2,2).

Step-by-step explanation:

The midpoints is given by

Midpoint =(\frac{x_{2}+x_{1}}{2},\frac{y_{2}+y_{1}}{2})

As given

The endpoints of CD are C(−4, 7) and D(0,−3).

Putting values in the above

Midpoint =(\frac{0-4}{2},\frac{-3+7}{2})

Midpoint =(\frac{-4}{2},\frac{4}{2})

Midpoints = (-2,2)

Therefore midpoints of line CD are (-2,2).

4 0
3 years ago
Read 2 more answers
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