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3 years ago

Please help! (Will give brainliest answer and hearts) Thank you and have a nice day!

Mathematics

1 answer:

Radda [10]3 years ago

4 0

Answer:

Step-by-step explanation:

It can't be A because there isn't an answer for 55

It can't be B because 8 students answered 70 or 75 % and there are 19 total students. 8/19 is not 50%

It can't be D because only one student answered 100%

And there are eight students who answered more than 80%

I think this is correct, the picture is a little blurry.

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Solve for x. round to nearest hundredth. PLS HELPP. will award brainliest

DENIUS [597]

Answer:

$18.03$

Step-by-step explanation:

<u>Formula:</u> $a^{2}+b^{2}=c^{2}$

$15^{2}+10^{2}=x^{2}$

$225+100=x^{2}$

$x^{2}=325$

$x = 5\sqrt{13}=18.03$

6 0

2 years ago

ANSWER AND I WILL DO YOU A FAVOR!!!!

Sonja [21]

T=21+4.5X

21 is the original temp.

4.5 is the constant rate I got when I subtracted 75-21=54 then divided 54/12min=4.5.

75 =21 + 4.5(12)

3 0

3 years ago

For a one-tailed test with a = .05 and a sample of n = 9, the critical value for the t statistic is t = 1.860.

ahrayia [7]

I think its B. False if im wrong sorry hope this helped tho :p

6 0

3 years ago

Which statements are true?<br>(look at picture)

Makovka662 [10]

Answer:

D is true, E is true, F is true

Step-by-step explanation:

Hello,

n is an odd number it means that n = 2a+1 where a is integer

$n^2-1=(2a+1)^2-1=4a^2+4a+1-1=4a(a+1)$

this is <u>not</u> an odd number

$n(n-1)=(2a+1)2a$

this is <u>not</u> an odd number

$(n-1)^2=(2a+1-1)^2=4a^2$

this is <u>not</u> an odd number

$n^2+2=(2a+1)^2+2=4a^2+4a+1+2=4a^2+4a+3= 2(2a^2+2a+1)+1$

so this is an odd number

$n(n-2)=(2a+1)(2a-1)=4a^2-1=4a^2-2+1=2(2a^2-1)+1$

so this is an odd number

$(n-2)^2=(2a+1-2)^2=(2a-1)^2=4a^2-4a+1 = 2(2a^2-2a)+1$

this is an odd number

hope this helps

7 0

3 years ago

What is the first step in solving quadratic equations by finding square roots? a. give the positive and negative answer C. b. is

tangare [24]

The first step in solving quadratic equations by finding square roots is; C:square root both sides to isolate x

<h3>How to solve quadratic equations?</h3>

To answer this question, we will take an example of a quadratic equation that we need to find the square root as;

x² = 36

Now, to get the roots which are the values of x, we will first have to take the square root of both sides to Isolate x. Thus;

√x² = √36

x = ±6

Read more about quadratic equations at; brainly.com/question/1214333

#SPJ1

6 0

2 years ago