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baherus [9]
3 years ago
11

I need help

Mathematics
1 answer:
Andrews [41]3 years ago
5 0

18(3+x) ; distribute to get original

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Pls help! Will mark Branliest!! 50 points for whoever answers!!!!!!
KiRa [710]

Answer: See below

Step-by-step explanation:

Isolate x for x-2y+2z=9

3x=9+2y

x=\frac{9+2y}{3}....(1)

Substitute (1) into the 2nd equation

\begin{bmatrix}-\frac{9+2y}{3}+3y=-4\\ 2\cdot \frac{9+2y}{3}-5y+3z=16\end{bmatrix}

\frac{3\left(-9+7y\right)}{3}=3\left(-4\right)

7y=-3

y=-3/7

Substitute y=-3/7

\begin{bmatrix}3z+\frac{18-11\left(-\frac{3}{7}\right)}{3}=16\end{bmatrix}

\begin{bmatrix}3z+\frac{53}{7}=16\end{bmatrix}

Isolate z by substituting it

3z+\frac{53}{7}=16

\frac{3z}{3}=\frac{\frac{59}{7}}{3}

z=\frac{59}{21}

For x =9+2y/3 substitute z=59/21 and y=-3/7

x=\frac{9+2\left(-\frac{3}{7}\right)}{3}

x=\frac{19}{7}

x=\frac{19}{7},\:z=\frac{59}{21},\:y=-\frac{3}{7}

6 0
3 years ago
Read 2 more answers
Okay will award brainliest and put alot of points so pls help I'm desparate!!!
Bad White [126]

Answer:

23 is 31/100

Step-by-step explanation:

not sure about the rest sorry :(

7 0
4 years ago
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12-packs of Skwunch apple juice cost $3.00 after a 40% discount. Which equation would allow you to find the original price of th
GaryK [48]

Let x be the original price.

Discount percentage = 40%

Price after discount = $3

So, x - \frac{40}{100} x = 3

\frac{100x-40x}{100} = 3

\frac{60x}{100} = 3

x = 3(\frac{100}{60} )

x=\frac{100}{20}

x = 5

Hence, the equation that would allow us to find the original price is 0.6x = 3.

6 0
3 years ago
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Given the point and its image, determine the scale factor.
BARSIC [14]

Answer:

it would be 2

Step-by-step explanation:

8 0
3 years ago
In degree measure, the angles pi/3,pi/4 , and pi/2 are respectively: A. 60, 45, 90 B. 30, 45, 90 C. 45, 60, 90 D. 60, 30, 90 (al
aev [14]
<span>Solution :- The value of pi expressed in radians and its equivalent degree is = 180 degree Hence, the value of pi/3 = 180/ 3 = 60 deg similarly, the value of pi/3 = 180/4= 45 deg similarly, the value of pi/2= 180/2= 90 deg Ans :- The angles of pi/3, pi/4, pi/ 4 is = 60, 45, 90 degree respectively. Hence the right option is answer is A.</span>
8 0
3 years ago
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