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4 years ago

Which quadrilateral has no right angle

Mathematics

2 answers:

Mariana [72]4 years ago

7 0

The only one with two obtuse and two right angles.

Trapezoid

quester [9]4 years ago

3 0

Squares and rectangles must all have exactly four right angles.

However, quadrilateral that don't have to have four right angles are trapezoids, parallelograms and rhombi.

trapezoids - different angles
parallelograms - 2 acute, 2 obtuse angles
rhombi - 2 acute, 2 obtuse angles

Note that a rhombus is a type of parallelogram.

Hope this helps! :)

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A political analyst found 43% of 300 randomly selected republican voters feel that the federal government has too much power. Fi

Genrish500 [490]

Answer:

Step-by-step explanation:

We want to determine 95% confidence interval of the population proportion of republican voters who feel that the federal government has too much power.

43% of 300 randomly selected republican voters feel that the federal government has too much power. This means that

p = 43/100 = 0.43

q = 1 - p = 1 - 0.43 = 0.57

n = 300

mean, u = np = 300 × 0.43 = 129

Standard deviation, s = √npq = √129×0.57 = 8.575

For a confidence level of 95%, the corresponding z value is 1.96. This is determined from the normal distribution table.

We will apply the formula

Confidence interval

= mean +/- z ×standard deviation/√n

It becomes

129 +/- 1.96 × 8.575/√300

= 129 +/- 0.9704

The lower end of the confidence interval is 129 - 0.9704 =128.0296

The upper end of the confidence interval is 129 + 0.9704 =129.9704

Therefore, with 95% confidence interval, the mean of the population proportion of republican voters who feel that the federal government has too much power is between 128.0296 and 129.9704

7 0

4 years ago

A plane takes off from a runway and begins its climb. The plane takes off at a constant acceleration of 20 LaTeX: m /s^{2} . Onc

lana66690 [7]

Answer:

The plane have traveled 1512.9 m from the time took off

Step-by-step explanation:

Acceleration $a = 20m/s^2$

Initial speed = u = 0

Final speed = v = 246 m/s

Time = t = 93

We are supposed to find how far would the plane have traveled from the time took off

We will use equation of motion

$v^2=u^2+2as\\(246)^2=2\times 20 \times s\\\frac{(246)^2}{2 \times 20}=s\\1512.9 m=s$

Hence The plane have traveled 1512.9 m from the time took off

4 0

3 years ago

Find the value of X to find measurement of

Slav-nsk [51]

Answer:

Value of angle A is 83.

solution,

I) x°+x°+15+2x°+1=180(Sum of angle of triangle)

or,4x+16=180

or,4x=180-16

or x=164/4

.°.x=41

Again

Angle A = 2x°+1 = 2×41 + 1 =83.

8 0

3 years ago

Find the circumference of the circle if the square has an area of 144 m. Give your answer to the nearest tenth. Use 3.14 for pie

frez [133]

Answer:

The circumference is 42.54

4 0

4 years ago

11. -1.099-12.001-0.09<br> Heyy I need help

Harlamova29_29 [7]

-13.19 is going to be the answer

5 0

3 years ago