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4 years ago

What is the domain of the function y= square root of x-10

1 answer:

8 0

I don't know if your saying y= √(x-10) or y= √(x) - 10. But I'll do both
Domain for √(x-10): [10, ∞)
Domain for √(x) - 10: [0, ∞)

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What is the product of all constants $k$ such that the quadratic $x^2 + kx +15$ can be factored in the form $(x+a)(x+b)$, where

Setler79 [48]

Answer:

$k=-16,k=-8,k=8,k=16$

Step-by-step explanation:

We are given quadratic equations as

$x^2+kx+15$

and it can be factored as

$=(x+a)(x+b)$

now, we can multiply factor term

$(x+a)(x+b)=x^2+(a+b)x+ab$

now, we can compare

$x^2+(a+b)x+ab=x^2+kx+15$

so, we get

$k=a+b$

$ab=15$

we are given that

'a' and 'b' are integers

so, we can find all possible factors

$15=(-1\times -15),(1\times 15)$

$15=(-3\times -5),(3\times 5)$

so, we can find k

At $(-1\times -15)$ :

$k=a+b$

we can plug values

$k=-1-15$

$k=-16$

At $(1\times 15)$ :

$k=a+b$

we can plug values

$k=1+15$

$k=16$

At $(-3\times -5)$ :

$k=a+b$

we can plug values

$k=-3-5$

$k=-8$

At $(3\times 5)$ :

$k=a+b$

we can plug values

$k=3+5$

$k=8$

So, values of k are

$k=-16,k=-8,k=8,k=16$

6 0

3 years ago

Why do you add a zero when multiplying two digits by two digits

malfutka [58]

When you add a zero to the problem, it shows you are now multiplying in the double-digits. Let's say you are multiplying 12x12. First you cover up the one then multiply them. Then cover up the two and you have 10. When you multiply them, it ends in a zero. Don't think of it as adding a zero but adding to products.

6 0

3 years ago

The ratio of income of a person to his savings is 10:1 if his saving for one year is 6000 what is his monthly income

Stells [14]

his monthly income is 60000

5 0

3 years ago

Jake cut a round gelatin dessert into 8 equal parts. five of the pieces were eaten . what is the angle measure of the dessert th

Alchen [17]

Answer:

3/8

Step-by-step explanation:

8-5=3

8 0

3 years ago

Read 2 more answers

I need help with question number 7. I don’t get it.

kramer

The answer is C.
When dividing fractions, the first fraction stays the same. Change the division sign to a multiplication sign. And flip the second fraction.

2/7 x 6/5

Multiply across.

12/35, which is equivalent (the same) to 12/35!

3 0

4 years ago