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lukranit [14]
3 years ago
15

X désigne un nombre quelconque. Exprimer à l'aide d'une expression littérale : a. La somme de x et de 12 b. Le produit de x par

5 c. La différence entre 17 et x d. Le quotient de x par 9
Mathematics
1 answer:
Minchanka [31]3 years ago
8 0

Answer:

L'expression littérale est la suivante

a) La somme de x et 12 b

Solution

X + 12b

b) Le produit de x par 5

Solution

X * 5

c) La différence entre 17 et x

Solution

17-X

d) Le quotient de x par 9

X / 9

Step-by-step explanation:

L'expression littérale est la suivante

a) La somme de x et 12 b

Solution

X + 12b

b) Le produit de x par 5

Solution

X * 5

c) La différence entre 17 et x

Solution

17-X

d) Le quotient de x par 9

X / 9

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What is the solution to the system of equations?<br><br> I will mark the brainliest answer
Stolb23 [73]
Ok so let us label our equations first
1- 3x+2y+z=7
2- 5x+5y+4z=3
3- 3x+2y+3z=1
subtracting equation 3 from equation 1
3x+2y+3z=1
(-). 3x+2y+z= 7
----------------------
2z=-6----->z=-3
since we already chose equation 1 and 3 we must involve equation 2
substituting the value if z in the second equation
5x+5y-12=3
5x+5y=15
choosing either the first or the third
3x+2y-3=7
3x+2y=10
solving the system
5x+5y=15
3x+2y=10
multipling the first equation by 2 and the second equation by 5
10x+10y=30
15x+10y=50
subtracting the two equations
-5x=-20--->x=4 substituting for the value of x
40+10y=30--->10y=-10y--->y=-1
so our soultion is x=4,y=-1,z==-3 or (4,-1,-3)








3 0
4 years ago
Solve 3/5 = 4m<br><br><br> pls help!!!
ololo11 [35]

Answer:

m = 3/20

Step-by-step explanation:

3/5 = 4m

3/(5*4) = m

3/20 = m

Check

3/5 = 4*3/20

3/5 = 12/20

6 0
2 years ago
Which number is written in scientific notation?
AysviL [449]

Answer:

I would say A. 7.8 x 10^-5

Step-by-step explanation:

7.8 x 10^-5 can also be written as 7.8 times 10 to the negative fifth power or the exponent of negative five. But, if you solve it you would get 0.000078 as the real number.

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You borrow $1500 to buy a new laptop. You pay 4.7% interest and repay the
Gemiola [76]

Answer:

Total interest is $74.55

Total payments $1574. 55

Step-by-step explanation:

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3 years ago
A coat with an original price tag of $400 was marked down by 40%. You have a coupon good for an additional 25% off. What is the
VMariaS [17]

Answer:

65%=$260

Step-by-step explanation:

40%+25%=65%

65% of 400

65/100*400

=$260

7 0
2 years ago
Read 2 more answers
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