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oksian1 [2.3K]
3 years ago
5

HELP ME ITS DUE IN 30 MINS

Mathematics
1 answer:
vichka [17]3 years ago
8 0

Step-by-step explanation:

honestly man i dont know how to help

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What two numbers add to 9 and multiply to -70
Alborosie
X, y - the numbers

The numbers add to 9 and multiply to -70.
x+y=9 \\
xy=-70 \\ \\
y=9-x \\
xy=-70 \\ \\
\hbox{substitute 9-x for y in the second equation:} \\
x(9-x)=-70 \\
9x-x^2=-70 \\
-x^2+9x+70=0 \\
-x^2+14x-5x+70=0 \\
-x(x-14)-5(x-14)=0 \\
(-x-5)(x-14)=0 \\
-x-5=0 \ \lor \ x-14=0 \\
x=-5 \ \lor \ x=14 \\ \\
y=9-x \\
y=9-(-5) \ \lor \ y=9-14 \\
y=14 \ \lor \ y=-5 \\ \\
(x,y)=(-5,14) \hbox{ or } (x,y)=(14,-5)

The numbers are -5 and 14.
4 0
3 years ago
5. What is the probability of rolling a 4 on a number
Dmitry [639]
The answer is independent
5 0
3 years ago
Write a system of linear inequalities to represent each graph.
Ostrovityanka [42]

5. The blue one is y >= 5x - 7

and green is y >= -0.65x + 3

6. y <= (4/5)x

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3 0
3 years ago
Factorise : x³ + x - 3x² -3​
ANEK [815]

Answer:

(x²+1)(x-3)

Step-by-step explanation:

Factorize x³ + x - 3x² -3​

x³-3x²+x-3

Factorize

x²(x-3)+1(x-3)

= (x²+1)(x-3)

Hence the factorized form is (x²+1)(x-3)

6 0
3 years ago
PLZ PLZ PLZ ANSWER CORRECTLY IN A HERRY!!!!!
garri49 [273]
I think the answer is 16
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3 years ago
Read 2 more answers
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