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olganol [36]
3 years ago
11

Here are two steps from the derivation of the quadratic formula,

Mathematics
1 answer:
BaLLatris [955]3 years ago
8 0

Answer:

A

Step-by-step explanation:

Taking the square root of both sides.

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−5y=−5<br> 7x+6y=7<br> ​<br> Is (5,1) a solution of the system
enot [183]

Answer:no, (5,1) is not a solution for the equation. (1/7,1) will be a solution for the equation.

Step-by-step explanation:

one way to do it is to plug 1 as the y-value into the first equation which does work but when you plug 5 as the x-value and 1 as the y-value in the second equation, it will get you to 41 which does not match so it will not be an equation. the other way to check is to solve by substitution which for the first equation, you divide both side by -5 and get y=1 then substitute y with 1 in the second equation and subtract both side by 6 and get 7x=1 and divide both side by 7 to get 1/7. the y-value match but the x-value don't so (5,1) is not a solution.

8 0
3 years ago
Pada hari kantin sebanyak 800 naskah kupon telah dijual,harga senaskah kupon masing masing rm 30 dan rm 50 .jumlah wang diperole
solniwko [45]

Answer:

Step-by-step explanation:

On the day of the canteen, 800 coupons were sold, the price of each coupon was RM 30 and RM 50 respectively. The amount of money earned from the sale of coupons was RM30000. How many copies of RM30 and RM50 coupons were sold?

Let:

RM 30 = x

RM 50 = y

x + y = 800 - - - (1)

30x + 50y = 30000 - - - (2)

From (1)

x = 800 - y

Put x = 800 - y in (2)

30(800 - y) + 50y = 30000

24000 - 30y + 50y = 30000

24000 + 20y = 30000

20y = 30000 - 24000

20y = 6000

y =

4 0
3 years ago
Which is greater than, -9/4 or -3?
Firdavs [7]

-9/4 is greater than -3 because -9/4 is also -2.25 and the less negative number is always greater than the more negative number.

Hope this helps!


7 0
3 years ago
Read 2 more answers
Halp me plssssssssssssssssssssssssssss
miss Akunina [59]

I think its 180/24 here is my work

\frac{3}{8}\\=\\ \\\frac{9}{24} \\\\\frac{5}{6}\\=\\ \\\frac{20}{24} \\ so you find the lcm of \frac{20}{24} and  \frac{9}{24} = 180/24

5 0
3 years ago
Read 2 more answers
What is the value of F(5) in the function below?
Sever21 [200]

Answer:

<h2>B. 243</h2><h2 />

Step-by-step explanation:

F(x) = 3^x

then

F(5) = 3^5 = 3×3×3×3×3 =243

6 0
3 years ago
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