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shutvik [7]
3 years ago
12

Solve the following equation. Then place the correct number in the box provided.

Mathematics
2 answers:
LuckyWell [14K]3 years ago
7 0
×+6-5=8-2
x+1=6
-1 -1
----------
x=5

shtirl [24]3 years ago
7 0

Answer:

5

Step-by-step explanation:

x + 6 - 5 = 8 - 2

8-2= 6.

6-5= 1.

So we can say x+1=6

So x = 5

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Find the area and perimeter of ABC at right. Give approximate (decimal) answers, not exact answers
Sever21 [200]

Answer:

Area of Δ ABC = 21.86 units square

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Given:

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∠C=30°

Height of triangle = 4 units.

To find area and perimeter of triangle we need to find the sides of the triangle.

Naming the end point of altitude as 'D'

Given BD\perp AC

For Δ ABD

Since its a right triangle with one angle 45°, it means it is a special 45-45-90 triangle.

The sides of 45-45-90 triangle is given as:

Leg1 =x

Leg2 =x

Hypotenuse =x\sqrt2

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∴ AD(Leg2)=4

∴ AB (hypotenuse) =4\sqrt2=5.66  

For Δ CBD

Since its a right triangle with one angle 30°, it means it is a special 30-60-90 triangle.

The sides of 30-60-90 triangle is given as:

Leg1(side opposite 30° angle) =x

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We are given BD(Leg 1)=4

∴ CD(Leg2) =4\sqrt3=6.93

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Length of side AC is given as sum of segments AD and CD

AC=AD+CD=4+6.93=10.93

Perimeter of Δ ABC= Sum of sides of triangle

⇒ AB+BC+AC

⇒ 5.66+8+10.93

⇒ 24.59 units

Area of Δ ABC = \frac{1}{2}\times base\times height

⇒  \frac{1}{2}\times 10.93\times 4

⇒ 21.86 units square

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3 years ago
Find the value of p in exact form<br> 7 cm<br> Pem<br> 13 cm
nadya68 [22]

Answer:

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