What is the part of a flower that needs pollen so a seed can be mad

Explain how you would name a sorting rule for 1 square, 1 rectangle, and 1 triangle

Marat540 [252]

You could sort them by there sides. So you count how many sides the figure has. Then it would be split up by two groups. One with with 4 sides and 1 with 3 sides.

4 0

2 years ago

PLEASE HELP!!! I REALLY NEED HELP!!

Eddi Din [679]

9514 1404 393

Answer:

$7.10

Step-by-step explanation:

Nevach's rate can be found by using x=1 in the equation for his pay.

y = 28.5 × 1 = 28.50 . . . . dollars

Carson's hourly rate can be found by dividing dollars by hours:

$214/(10 h) = $21.40/h

Nevach's rate exceeds this by ...

$28.40 -21.40 = $7.10

Nevach earns $7.10 more per hour.

6 0

2 years ago

You are baking donuts for your class. There are eight total students in your class and you have to bake 11 donuts. Right and sol

garri49 [273]

Answer:

8+11x

Step-by-step explanation:

5 0

2 years ago

The sum of the reciprocals of two consecutive integers is -9/20. Find the two integers

mr_godi [17]

Suppose the first integer is x, the second one is then x+1
reciprocals are 1/x and 1/(x+1)
1/x +1/(x+1)=-9/20
make the denominators the same:
1(x+1)/x(x+1) + 1x/x(x+1)=-9/20
simplify the demonstrator and add up the numerators: (2x+1)/(x^2+x)=-9/20
20(2x+1)=-9(x^2+x)
40x+20=-9x^2-9x
9x^2 +49x+20=0
factor: (1+5)(9x+4)=0
x=-5 or x=-4/9 (this one doesn't work because it is not an integer)
so the first integer is -5, the second integer is -4

5 0

2 years ago

Assume the blood pressures of 10 people were measured before and after sleeping for the night. What is the corresponding critica

NeX [460]

Answer:

For the critical value we need to calculate the degrees of freedom given by:

$df = n-1= 10-1=9$

And since we have a one tailed test we need to look in the t distribution with 9 degrees of freedom a quantile who accumulates 0.05 of the area on a tail and we got:

$|t_{crit}| =1.833$

Step-by-step explanation:

Previous concepts

A paired t-test is used to compare two population means where you have two samples in which observations in one sample can be paired with observations in the other sample. For example if we have Before-and-after observations (This problem) we can use it.

Let put some notation

x=test value with right arm , y = test value with left arm

The system of hypothesis for this case are:

Null hypothesis: $\mu_y- \mu_x = 0$

Alternative hypothesis: $\mu_y -\mu_x \neq 0$

The first step is calculate the difference $d_i=y_i-x_i$

The second step is calculate the mean difference

$\bar d= \frac{\sum_{i=1}^n d_i}{n}= \frac{361}{5}$

The third step would be calculate the standard deviation for the differences, and we got:

$s_d =\frac{\sum_{i=1}^n (d_i -\bar d)^2}{n-1}$

The 4 step is calculate the statistic given by :

$t=\frac{\bar d -0}{\frac{s_d}{\sqrt{n}}}$

For the critical value we need to calculate the degrees of freedom given by:

$df = n-1= 10-1=9$

And since we have a one tailed test we need to look in the t distribution with 9 degrees of freedom a quantile who accumulates 0.05 of the area on a tail and we got:

$|t_{crit}| =1.833$

5 0

3 years ago