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4 years ago

The more accurate the better, giving brainliest to best answer

Mathematics

2 answers:

Kaylis [27]4 years ago

8 0

10.5in^2.....................

Andrew [12]4 years ago

6 0

The trapezoid has a height of 3in. a shorter base measuring 2.75 in and a longer base measuring 4.25 in. the total area is 10.5 in^2

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Evaluate (13+2) Divided by(9-4)

skelet666 [1.2K]

Answer:

Step-by-step explanation:

following the order of operations, whatever is in the parentheses gets done first. so you would add 13 + 2 and get 15. then you would subtract 9-4 and get 5. then you would divide the numbers that you got and get 3.

6 0

4 years ago

Read 2 more answers

I Need Help On This

disa [49]

Answer:

The first blank: not equal

The 2nd blank: not right triangle (it's acute triangle)

The 3rd blank: equal

The 4th blank: it's right triangle

Step-by-step explanation:

4^2 = 3^2 + 3^2

<=> 16 = 9 + 9

<=> 16 = 18 ( nonsense)

so triangle LKJ is not right triangle

5^2 = 4^2 + 3^2

<=> 25 = 16 + 9

<=> 25 = 25 ( make sense)

so triangle ABC is right triangle

Done!! :))

6 0

3 years ago

If the system of equations has infinity many solutions, which statement must be true

just olya [345]

Answer:

D.On the graph, any point (x,y) that satisfies one of the equations must also satisfy the other equation.

Step-by-step explanation:

3 0

3 years ago

2^-3/2^-5 A)2^2 B)1/2^2 C)2^8 D)1/2^8

CaHeK987 [17]

Here is your answer

A) $\huge{2}^{2}$

REASON :

CONCEPT USED: $\frac{{a}^{m}}{{a}^{n}}$

= ${a}^{m-n}$

So,

$\frac{{2}^{-3}}{{2}^{-5}}$

= ${2}^{-3-(-5)}$

= ${2}^{-3+5}$

= ${2}^{2}$

HOPE IT IS USEFUL

4 0

3 years ago

Identify the critical t. An independent random sample is selected from an approximately normal population with unknown standard

nasty-shy [4]

Answer and Step-by-step explanation: The critical value for a desired confidence level is the distance where you must go above and below the center of distribution to obtain an area of the desired level.

Each sample has a different degree of freedom and critical value.

To determine critical value:

1) Calculate degree of freedom: df = n - 1

2) Subtract the level per 100%;

3) Divide the result by 2 tails;

4) Use calculator or table to find the critical value t*;

For n = 5 Level = 90%:

df = 4

t = $\frac{1-0.9}{2}$ = 0.05

Using t-table:

t* = 2.132

n = 13 Level = 95%:

df = 12

t = $\frac{1-0.95}{2}$ = 0.025

Then:

t* = 2.160

n = 22 Level = 98%

df = 21

t = $\frac{1-0.98}{2}$ = 0.01

t* = 2.819

n = 15 Level = 99%

df = 14

t = $\frac{1-0.99}{2}$ = 0.005

t* = 2.977

The critical values and degree of freedom are:

sample size level df critical value

5 90% 4 2.132

13 95% 12 2.160

22 98% 21 2.819

15 99% 14 2.977

4 0

3 years ago