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3 years ago

Help Me, Will give 100 points.

Mathematics

1 answer:

Bad White [126]3 years ago

6 0

Answer:

baka

Step-by-step explanation:

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Find the value of k for which the quadratic equation 4x2+kx+3=0 has equal roots.

charle [14.2K]

Answer:

k = +/-√48

Step-by-step explanation:

4x^2 + kx + 3 = 0

For equal (duplicate) roots the discriminant = 0, so

k^2 - 4*4*3 = 0

k^2 - 48 = 0

k^2 = 48

k = +/-√48

4 0

3 years ago

If f(x) = 4x2 and g(x) = x+1, find (*•g)(x).

Grace [21]

Answer:

Step-by-step explanation:

(f · g)(x) = f(x) · g(x)

We have f(x) = 4x² and g(x) = x + 1. Substitute:

(f · g)(x) = (4x²)(x + 1) <em>use the distributive property</em>

(f · g)(x) = (4x²)(x) + (4x²)(1)

(f · g)(x) = 4x³ + 4x²

5 0

3 years ago

(2x+10)+(2x-30) please help me

Sonja [21]

Answer:

4x-20

Step-by-step explanation:

2x + 2x =4x

10 + (-30) = -20

put it together!

4x-20

(i hope thats the answer form u were asking for) xoxo raina

6 0

3 years ago

Read 2 more answers

Write your answer as a

postnew [5]

8 friends: 2 pounds of grapes.

Each friend get 1/4 a pounds of grapes.

4 0

3 years ago

What is -4/5+ 7/15 when you simplify ?

photoshop1234 [79]

Answer: $-\frac{1}{3}$

Step-by-step explanation:

When you add fractions with different denominators, you need to find the Least common denominator (LCD):

Descompose the denominators (5 and 15) into its prime factors and then choose the commons and non-commons with the highest exponents:

$5=5*1\\15=3*5\\\\LCD=5*3*1=15$

Divide the LCD by each original denominator of each fraction and multiply the result by each original numerator of each fraction. After this, you can add the numerators and reduce the fraction.

Then:

$-\frac{4}{5}+\frac{7}{15}=\frac{-(4)(3)+7(1)}{15}=\frac{-12+7}{15}=\frac{-5}{15}=-\frac{1}{3}$

7 0

3 years ago

Read 2 more answers