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3 years ago

Nd

Mathematics

2 answers:

notka56 [123]3 years ago

7 0

Answer:

66 more female sheep.

Step-by-step explanation:

What you do is subtract 113 subtract 47 which is 66 and if you want to make sure add,66+47.

VladimirAG [237]3 years ago

6 0

Answer:

19 more female sheep.

Step-by-step explanation:

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Henry has a 88 average after 7 assignments in his class. He would like

dimulka [17.4K]

Answer: He need to score 100 in next assignment to can get an A.

Step-by-step explanation:

Given: Average marks till now = 88%

Average = (sum) divided by (Number of observations)

Here, number of assignments =7

So, $88=\dfrac{(sum)}{7}\Rightarrow\ sum =88\times7= 616$ (i)

After next assignment, number of assignments = 8

Required Average = 89.5

$89.5=\dfrac{sum}{8}\Rightarrow\ sum = 89.5\times8= 716$ (ii)

(ii)-(i) gives 100

So, he need to score 100 in next assignment to can get an A.

5 0

3 years ago

a study of the effects of exercis used rats bred to have high or low capacity for exercise. The 8 high capacity rats had mean bl

zavuch27 [327]

Answer:

$t=-2.86$

Step-by-step explanation:

From the question we are told that:

Sample 1 $n_1=8$

Sample 1 mean blood pressure $\=x_1=89mmHg$

Sample 1 variance $\sigma_1=81$

Sample 2 $n_2=8$

Sample 2 mean blood pressure $\=x_2=105mmHg$

Sample 2 variance $\sigma_2=169$

Generally the equation for the test of statistic is mathematically given by

$t=\frac{\=x_1-\=x_2}{\sqrt{\frac{\sigma_2}{n_1}+\frac{\sigma_2}{n_2} } }$

$t=\frac{89-105}{\sqrt{\frac{81}{8}+\frac{169}{8} } }$

$t=-2.86$

therefore the samples test for comparing the two population means

$t=-2.86$

3 0

3 years ago

PLEASE HELP THIS IS DUE IN 5 MINUTES PLEASE

Fed [463]

Answer: 8/5

Check:

8/5 = 1.6

1.6 x 5 = 8

7 0

3 years ago

Read 2 more answers

Find the equation of the axis of symmetry for the parabola y = x^2 + 5x.

viktelen [127]

Axis of symmetry =-b/2a
so subsitiute
a=1,b=5
-5/2
i believe thr axis of symmetry is at -2.5

6 0

4 years ago

Simone put $250 into her savings account that has an annual interest rate

Umnica [9.8K]

The other answers confuse me. 267.5 since 3.5=0.035 so 250x0.03.5=8.75x2=17.5+250

4 0

3 years ago