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2 years ago

Use substitution to solve the system of equations. -1=2x-y 8x-4y=-4

Mathematics

1 answer:

sineoko [7]2 years ago

6 0

Answer:

x=-1/2+y/2

Step-by-step explanation:

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The sum of the roots of 3x 2 + 11x - 4 = 0 is -11/3 -4/3 11/3 4/3

givi [52]

Answer:

The correct option is 1.

Step-by-step explanation:

If a quadratic equation is defined as

$ax^2+bx+c=0$ .... (1)

Then the sum of the roots is -b/a and the product of roots is c/a.

The given equation is

$3x^2+11x-4=0$ ... (2)

From (1) and (2) we get a=3, b=11 and c=-4.

The sum of roots is

$\frac{-b}{a}=-\frac{11}{3}$

The sum of roots is $-\frac{11}{3}$ .

Therefore the correct option is 1.

5 0

3 years ago

How does adding a solute ( use only one - salt or sugar) effect the time of water to change from a liquid to a solid?

Kruka [31]

Answer:

adding salt makes the water freeze slower and evaporate slower too.

Step-by-step explanation:

While pure water freezes at 0°C (32°F), salt water needs to be colder before it freezes and so it usually takes longer to freeze. The more salt in the water, the lower the freezing point.

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2 years ago

What algebraic property is demonstrated in the equation below? 5(8× - 4) - 10 = 40x - 20 - 10

Nastasia [14]

Distributive Property

5 0

2 years ago

Prime factorization for 50 using components

suter [353]

Prime factorization of 5·2·5=5^2·2

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3 years ago

Classify the triangle with 9, 15, 19 as an acute right obtuse or not a triangle

Novosadov [1.4K]

Answer:

Hence the correct option is the last one . The triangle is an obtuse angled triangle.

Step-by-step explanation:

i) the sum of any two sides added together is greater than the third side hence this is a triangle.

ii) it is not a right angled triangle as $\sqrt{9^{2} + 15^{2} } \neq 19$ and $\sqrt{9^{2} + 15^{2} } < 19$

iii) the triangle is not acute from ii) above

iv) the triangle is an obtuse triangle from ii) above.

8 0

2 years ago