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3 years ago

Hello!! I have a question, can you please answer it. ^^

Mathematics

1 answer:

xeze [42]3 years ago

5 0

Answer:

1. 75

2. 1

Step-by-step explanation:

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Which expression is equal to 10/√50 Please show work thx:)

zmey [24]

so the right answer is of option B....

5 0

3 years ago

Read 2 more answers

If x + y = 4 and x2 − y2 = 64, what is the value of (x − y)?

murzikaleks [220]

The value of (x-y) is 16

Further explanation:

We have to use the given values to find the value

Given

$x+y=4\\and\\x^2-y^2=64$

We will use:

$x^2-y^2=64$

Simplifying by using: $x^2-y^2=(x+y)(x-y)$

So,

$(x+y)(x-y)=64$

As we know that x+y=4

Putting the value in equation

$(4)(x-y)=64$

Dividing both sides by 4

$\frac{4(x-y)}{4}=\frac{64}{4}\\x-y=16$

The value of (x-y) is 16

Keywords: Algebraic formulas, Simplification

Learn more about algebraic expressions at:

#LearnwithBrainly

7 0

3 years ago

Can anyone do these problems it’s for my daughter in law

Naya [18.7K]

Classwork:

Given $f(x) = x^2 - 1$ and $g(x)=2x+5$ , we have

(1) $(f\circ g)(x) = f(g(x)) = f(2x+5) = (2x+5)^2 - 1 = \boxed{4x^2+20x+24}$

Using the composition found in (1), we have

(2) $(f\circ g)(-2) = 4\cdot(-2)^2+20\cdot(-2)+24 = \boxed{0}$

(3) $(g\circ f)(x) = g(f(x)) = g(x^2-1) = 2(x^2-1) + 5 = \boxed{2x^2 + 3}$

Using the composition found in (3),

(4) $(g\circ f)(1) = 2\cdot1^2+3 = \boxed{5}$

Homework:

Now if $f(x)=x^2-3x+2$ , we would have

(1) $(f\circ g)(x) = f(2x+5) = (2x+5)^2-3(2x+5)+2 = \boxed{4x^2+14x+12}$

For (2), we could explicitly find $(g\circ f)(x)$ then evaluate it at x = -1 like we did in the classwork section, but we don't need to.

(2) $(g\circ f)(-1) = g(f(-1)) = g((-1)^2-3\cdot(-1)+2) = g(6) = 2\cdot6+5 = \boxed{17}$

(3) We can demonstrate that both methods work here:

• by using the result from (1),

$(f\circ g)(2) = 4\cdot2^2+14\cdot2+12 = \boxed{56}$

• by evaluating the inner function at x = 2 first,

$(f\circ g)(2) = f(g(2)) = f(2\cdot2+5) = f(9) = 9^2-3\cdot9+2 = \boxed{56}$

4 0

2 years ago

Why is my brainly say “oops something went wrong”

NemiM [27]

Answer:

Idk

for me it keeps saying

YoU hAvE bEeN bLoCkEd

Step-by-step explanation:

5 0

3 years ago

seven subtracted from 3 times a number is equal to 9 more than 5 times the number. what is the number? _______

Illusion [34]

3x - 7 = 5x + 9
3x - 5x = 9 + 7
-2x = 16
x = 16/-2
x = -8 <== ur number

6 0

3 years ago