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3 years ago

Pleasee help from anyone

Mathematics

2 answers:

Brut [27]3 years ago

6 0

Answer:

discriminant = 120

2 real roots ( or 2 x intercepts)

Step-by-step explanation:

f(x) = -7x^2 +8x+2

The discriminant is

b^2-4ac

Where ax^2 +bx+c

so a = -7 b = 8 and c =2

(8)^2 -4(-7) *(2)

64 +56

120

If the discriminant is >0 we have 2 real roots

If the discriminant =0 we have 1 real root

If the discriminant <0 we have 2 complex root ( or no real roots)

Margaret [11]3 years ago

4 0

Answer:

18 and 22.8 will be your answer

Step-by-step explanation:

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In how many years will rupees 150 double itself at 4% S.I.?

nikitadnepr [17]

Answer:

Simple interest = PRT/100

300 = 150 x 4 x T/100

2 x 100/4 = T

Therefore T = 50 years

Hope this helps!

7 0

3 years ago

If the point (a,3) lies on the graph of the equation 5x + y = 8 then a =?

Contact [7]

Answer:

a = 1

Step-by-step explanation:

Given the point (a, 3) is on the line: 5x + y = 8.

Any point on the line satisfies the equation.

So, (a, 3) should satisfy the equation 5x + y = 8

Substituting x = a and y = 3, we get:

5(a) + 3 = 8

$\implies 5a = 5$

⇒ a = 1

Therefore, (1, 3) is the point on the line.

3 0

3 years ago

5x + 2y = 6 what is the solution?

Arturiano [62]

The answer is x=-2/5y+6/5

5 0

3 years ago

Read 2 more answers

How do I solve this question?

Oduvanchick [21]

9514 1404 393

Answer:

no, y does not vary directly with x

Step-by-step explanation:

If there is direct variation, the constant of variation can be found as ...

k = y/x

Here, those ratios are ...

y/x = 6/3 = 2

y/x = 18/6 = 3

y/x = 24/8 = 3

The ratio of y to x is NOT A CONSTANT, so <em>there is no direct variation.</em>

4 0

3 years ago

Let f(x)=3x+2. What is f(2)?

puteri [66]

Answer:

$\huge\boxed{\sf f(2) = 8}$

Step-by-step explanation:

$\sf Given \ that \ f(x) = 3x + 2 \\\\Put \ x = 2 \\\\f(2) = 3(2) + 2\\\\f(2) = 6+2\\\\\bold{f(2) = 8}\\\\\rule[225]{224}{2}$

Hope this helped!

<h2>~AnonymousHelper1807</h2>

3 0

3 years ago