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3 years ago

Someone help me please?

Mathematics

2 answers:

AlekseyPX3 years ago

6 0

(r-3)^2 I think this is correct because r^2 means r*r and you are subtracting 9 so I just multiplyed 3*3.

yanalaym [24]3 years ago

4 0

Is a (r + 3) (r - 3)

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What is 3/16= c-7/8 please answer

Bingel [31]

Answer:

c=17/16

Step-by-step explanation:

3/16=c-7/8

find the common denominator

3/16=c-14/16

add 14/16 on both sides to cancel

c=17/16

7 0

3 years ago

Read 2 more answers

What are the intercepts of the line 2x + 4y = 12?

Darina [25.2K]

if you're finding the x intercept, y is ALWAYS 0, so in this, you can just get rid of the -4y because you know that it's 0, so you're left with 2x=12 divide by 2 on both sides so you find x intercept is (6,0) on the graph
the y works the same way, if you're looking for the y, you know that the x is zero, so you're left with -4y=12, divide by -4y on both sides and you end up with the y intercept being (0,-3)

x int.= (6,0)
y int.= (0,-3)

by the way, when it's written like that, it's called standard form, so to find the intercepts on 2x=12+4y, you'd have to convert it into standard form (Ax=By=C) so you subtract 4y on both sides to make it 2x-4y=12, and then once you have it like that you can do the math to find the y and x intercepts.

6 0

3 years ago

Question is in picture need help asap

Andrej [43]

The given expression is:

$\sqrt[4]{ 9^{ \frac{1}{2}x } }$

4th root is equivalent to raising the expression to power $\frac{1}{4}$ . So, re-writing the expression by converting radical to exponent:

$( 9^{ \frac{1}{2}x } )^{ \frac{1}{4} } \\ \\ 
= 9^{ \frac{1}{8}x }$

Therefore, the given expression simplifies to $9^{ \frac{1}{8}x }$

6 0

3 years ago

At what point do the lines y=x-4 and 2x+y=2 intersect?

earnstyle [38]

Answer:

(2, -2)

Step-by-step explanation:

Given

y = x - 4
2x + y = 2

Solving by substitution

2x + (x - 4) = 2
3x - 4 = 2
3x = 6
x = 2

Then finding y

y = x - 4
y = 2 - 4
y = -2

Intersection point is (2, -2)

6 0

2 years ago

In order to determine an interval for the mean of a population with unknown standard deviation, a sample of 24 items is selected

nikitadnepr [17]

If the sample size of population is 24 then the number of degrees of freedom for reading the t value is 23 which is option c.

Given sample size of 24,mean 23.

We have to determine the number of degrees of freedom which will be used to find the critical values of t.

Degree of freedom is the number of values in the final calculation of a statistic that are free to vary means that can change their values in the formula of calculating t.

t=(X-μ)/s/ $\sqrt{n}$

where X is sample mean ,

μ is hypothsised population mean

s is sample standard deviation

n is sample size.

Degree of freedom=n-1

In this question n is 24 so the degree of freedom =24-1=23.

Hence the number of degrees of freedom for reading the t value is 23.

Learn more about degree of freedom at brainly.com/question/17305237

#SPJ4

5 0

2 years ago