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3 years ago

CBSS maths class 10 standard solutions

Mathematics

1 answer:

brilliants [131]3 years ago

6 0

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What are the exact solutions of x2 = 5x + 2? (1 point)

bazaltina [42]

Answer:

A. x equals 5 plus or minus the square root of thirty-three all over 2

Step-by-step explanation:

Let's move all the terms to one side:

$x^2=5x+2$

$x^2-5x-2=0$

Now, we want to use the quadratic formula, which states that for a quadratic equation of the form $ax^2+bx+c=0$ , the roots can be found with the equation: $x=\frac{-b+\sqrt{b^2-4ac} }{2a}$ or $x=\frac{-b-\sqrt{b^2-4ac} }{2a}$ .

Here, a = 1, b = -5, and c = -2, so plug these in:

$x=\frac{-(-5)+\sqrt{(-5)^2-4(1)(-2)} }{2(1)}=x=\frac{5+\sqrt{25+8} }{2}=\frac{5+\sqrt{33} }{2}$

$x=\frac{-(-5)-\sqrt{(-5)^2-4(1)(-2)} }{2(1)}=x=\frac{5-\sqrt{25+8} }{2}=\frac{5-\sqrt{33} }{2}$

Thus, the answer is A.

Hope this helps!

6 0

4 years ago

Read 2 more answers

What is the answer to 7(4p+2p+3r) help me pls =(

Alex Ar [27]

Answer:

42p + 21r

Step-by-step explanation:

First look at the parentheses. Since 4p and 2p are the same variables, you can add them.

7(6p + 3r)

now you use the distributive property.

7 x 6p + 7 x 3r

42p + 21r

and then you get you’re answer.

8 0

3 years ago

If g(x) = a f(x + b), how is f(x) transformed to get g(x)?

nevsk [136]

Answer:

There was a Horizontal translation left b units and then Vertical stretch or compression

Step-by-step explanation:

Given : $g(x) = a f(x + b)$

We are supposed to show the transformation

Rule : f(x)→f(x+c)

Horizontal translation left c units

So, f(x+b) is the Horizontal translation left b units

Rule : f(x)→cf(x)

Vertical stretch or compression

So, $g(x) = a f(x + b)$

So, Initially there was a Horizontal translation left b units and then Vertical stretch or compression

5 0

4 years ago

Question 3.<br> How do you write 4% as a decimal?<br> A) 0.4<br> B) 0.40<br> C) 0.04

AnnyKZ [126]

C. 0.04 would be the correct answer.

5 0

3 years ago

Read 2 more answers

2x^3-3x^2+kx-1 is divided (x-1),the remainder is 2 find k

Debora [2.8K]

Answer:

k = 4

Step-by-step explanation:

if f(x) is divided by (x - h) then f(h) is the remainder

f(x) = 2x³ - 3x² + kx - 1

divided by (x - 1) , so h = 1 , then

2(1)³ - 3(1)² + k(1) - 1 = 2

2 - 3 + k - 1 = 2

- 2 + k = 2 ( add 2 to both sides )

k = 4

7 0

3 years ago