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Alina [70]
1 year ago
8

7/8 - 6/7. what is the answer.???

Mathematics
1 answer:
lesantik [10]1 year ago
6 0

Answer:

0.0178 is the answer

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PLEASE HELP ME I REALLY NEED HELP
Montano1993 [528]

Answer:

mean; 7.55

median: 9

range: 8

mode: 10

standard deviation: 2.9 or 3

Step-by-step explanation:

4 0
3 years ago
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Find the area of a quadrilateral ABCD in which AB = 3 cm, BC = 4 cm, CD = 4 cm, DA = 5 cm and AC = 5 cm.
melamori03 [73]

Answer:

6+2\sqrt{21}\:\mathrm{cm^2}\approx 15.17\:\mathrm{cm^2}

Step-by-step explanation:

The quadrilateral ABCD consists of two triangles. By adding the area of the two triangles, we get the area of the entire quadrilateral.

Vertices A, B, and C form a right triangle with legs AB=3, BC=4, and AC=5. The two legs, 3 and 4, represent the triangle's height and base, respectively.

The area of a triangle with base b and height h is given by A=\frac{1}{2}bh. Therefore, the area of this right triangle is:

A=\frac{1}{2}\cdot 3\cdot 4=\frac{1}{2}\cdot 12=6\:\mathrm{cm^2}

The other triangle is a bit trickier. Triangle \triangle ADC is an isosceles triangles with sides 5, 5, and 4. To find its area, we can use Heron's Formula, given by:

A=\sqrt{s(s-a)(s-b)(s-c)}, where a, b, and c are three sides of the triangle and s is the semi-perimeter (s=\frac{a+b+c}{2}).

The semi-perimeter, s, is:

s=\frac{5+5+4}{2}=\frac{14}{2}=7

Therefore, the area of the isosceles triangle is:

A=\sqrt{7(7-5)(7-5)(7-4)},\\A=\sqrt{7\cdot 2\cdot 2\cdot 3},\\A=\sqrt{84}, \\A=2\sqrt{21}\:\mathrm{cm^2}

Thus, the area of the quadrilateral is:

6\:\mathrm{cm^2}+2\sqrt{21}\:\mathrm{cm^2}=\boxed{6+2\sqrt{21}\:\mathrm{cm^2}}

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3 years ago
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Explain how you could use the construction tool or a compass and straightedge to create a line segment that is twice as long as
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A construction is a geometric drawing that uses a limited set of tools, usually a compass and straightedge. You can ... compass and straightedge (a ruler without marks) to construct a segment that is congruent to a given segment, and an ... CRITICAL THINKING: Describe how you could use a compass and a straightedge to.


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Please need help with one
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the answer of m angle q is 77

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