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3 years ago

63 of 90 on a number line

1 answer:

7 0

You should make a number line with number 1 - 90 and then make little hops from 90 - 89 89- 87 and so on until you have jumped 63 spaces.

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To save money, a local charity organization wants to target its mailing requests for donations to individuals who are most suppo

mars1129 [50]

Answer:

The 80% confidence interval for difference between two means is (0.85, 1.55).

Step-by-step explanation:

The (1 - α) % confidence interval for difference between two means is:

$CI=(\bar x_{1}-\bar x_{2})\pm t_{\alpha/2,(n_{1}+n_{2}-2)}\times SE_{\bar x_{1}-\bar x_{2}}$

Given:

$\bar x_{1}=M_{1}=6.1\\\bar x_{2}=M_{2}=4.9\\SE_{\bar x_{1}-\bar x_{2}}=0.25$

Confidence level = 80%

$t_{\alpha/2, (n_{1}+n_{2}-2)}=t_{0.20/2, (5+5-2)}=t_{0.10,8}=1.397$

*Use a t-table for the critical value.

Compute the 80% confidence interval for difference between two means as follows:

$CI=(6.1-4.9)\pm 1.397\times 0.25\\=1.2\pm 0.34925\\=(0.85075, 1.54925)\\\approx(0.85, 1.55)$

Thus, the 80% confidence interval for difference between two means is (0.85, 1.55).

3 0

2 years ago

A partial proof was constructed given that MNOP is a parallelogram.

Elena-2011 [213]

Answer:

Step-by-step explanation:

B. angle N is supplementary to angle P

4 0

2 years ago

Read 2 more answers

Evaluate 3x-4y when x=5 and y=-1

balandron [24]

Answer:

19 is the answer

Step-by-step explanation:

3x - 4y

= 3 × 5 - 4 × (-1)

= 15 + 4

= 19

hope this answer will help you

8 0

2 years ago

Which function is the inverse of f Superscript negative 1 Baseline (x) = negative one-fifth x minus four-fifths?

DedPeter [7]

Answer:

f(x) = -5x - 4

Step-by-step explanation:

We want to get the inverse of the following function:

f^-1(x) = (-1/5)x - 4/5

To do that, we have to replace x with f(x) and f^-1(x) with x, as follows:

x = (-1/5)f(x) - 4/5

And then solve for f(x), the inverse of f^-1(x).

x + 4/5 = (-1/5)f(x)

f(x) = -5x + (-5)4/5

f(x) = -5x - 4

To check our result we compute a pair (x, f(x))

x f(x)

1 -5*1 - 4 = -9

which has to be equivalent to (-9, 1) in the original function

x f^-1(x)

-9 (-1/5)*(-9) - 4/5 = 1

5 0

3 years ago

Read 2 more answers

Can you help with this?

gregori [183]

The slope of the given line = 1 so the slope of the line perpendicular to it will be -(1/1) = -1.
It also passes through point (1, -1) so we use the point slope equation

y - y1 = m(x - x1)

y - -1) = -1(x - 1)
y + 1 = -x + 1
y = - x <--------- that's the answer

4 0

3 years ago