All categories

2 years ago

Please help me. I have 1 question. thank you.

Mathematics

2 answers:

Vlad [161]2 years ago

8 0

B/10 = 6/8
b = 10*6 / 8
b = 60/8
b = 15/2

a^2 = ( 15/2)^2 - 6^2
a^2 = 225/4 - 36
a^2 = 225/4 -144/4
a^2 = 81/4
a = 9/2

answer is A
a = 9/2, b = 15/2

Ber [7]2 years ago

7 0

A = 9/2; b = 15/2 so answer A

You might be interested in

I need this for a test plz ?

nekit [7.7K]

The answer is b or 2

4 0

2 years ago

A clinical trial tests a method designed to increase the probability of conceiving a girl. In the study 580 babies were born, an

Vadim26 [7]

Answer:

0.4967<p<0.6033

Not effective

Step-by-step explanation:

given that a clinical trial tests a method designed to increase the probability of conceiving a girl.

In the study 580 babies were born, and 319 of them were girls

Sample proportion p= $\frac{319}{580} =0.55$

$q=1-p =0.45$

Standard error of proportion p = $\sqrt{\frac{pq}{n} } =0.0207$

Margin of error for 99%= Z critical * std error= $2.58*0.0207\\=0.0533$

(Since sample size is large Z value is used)

Confidence interval 99%

= $(0.55-0.0533, 0.55+0.0533)\\= (0.4967, 0.6033)$

0.4967<p<0.6033

This method appears to be not effective as the confidence interval 99% contains 0.50 indicating probability for girls is still 0.50

7 0

2 years ago

Solve the compound inequality, showing your work. Name the solution set and then draw the graph of the solution set.y-2<-5 or

Ede4ka [16]

$y - 2 \ \textless \ -5$
$y \ \textless \ -5 + 2$
$y \ \textless \ -3$

and

$y - 2 \ \textgreater \ 5$
$y \ \textgreater \ 5 + 2$
$y \ \textgreater \ 7$

The value of y is greater than 7 and less than -3
The number line is shown below

8 0

2 years ago

on a recent standardized test, Ahmed scored int he 90 percentile. If 2800 people took the test, then Ahmed's score was higher th

Readme [11.4K]

Answer:

Ahmed scored the same or better than 2,520 people that took the test

explanation:
percentile is the percentage of people you scored the same/better than on something
90% of 2800 is 2520
I hope this helps!

3 0

1 year ago

A recipe says it produces the best sweet tea. In addition to using tea bags, the recipe calls for 1/2 cup of sugar for every 1 1

Solnce55 [7]

Answer:

y = 3x

Step-by-step explanation:

In this case, the ratio between sugar and water is 0.5 : 1.5 or 1 : 3.

That means that you need three cups of water for every cup of sugar.

In order to put this into an equation, the slope would be 3/1 or simply 3, and the y-intercept is 0. Even if you used the 0.5 : 1.5 ratio, the slope would be the same since 1.5 / 0.5 = 3.

6 0

2 years ago