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3 years ago

What is x? -4(2x-9)+6(-x+1)=-8x-5(3x- 6/5)

Mathematics

1 answer:

TiliK225 [7]3 years ago

7 0

X is -4 Isolate the variable by dividing each side by factors that don't contain the variable.

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Here is a triangular pyramid and its net.

galben [10]

Answer:

a) Area of the base of the pyramid = $15.6\ mm^{2}$

b) Area of one lateral face = $24\ mm^{2}$

c) Lateral Surface Area = $72\ mm^{2}$

d) Total Surface Area = $87.6\ mm^{2}$

Step-by-step explanation:

We are given the following dimensions of the triangular pyramid:

Side of triangular base = 6mm

Height of triangular base = 5.2mm

Base of lateral face (triangular) = 6mm

Height of lateral face (triangular) = 8mm

a) To find Area of base of pyramid:

We know that it is a triangular pyramid and the base is a equilateral triangle. $\text{Area of triangle = } \dfrac{1}{2} \times \text{Base} \times \text{Height} ..... (1)\\$

${\Rightarrow \text{Area of pyramid's base = }\dfrac{1}{2} \times 6 \times 5.2\\\Rightarrow 15.6\ mm^{2}$

b) To find area of one lateral surface:

Base = 6mm

Height = 8mm

Using equation (1) to find the area:

$\Rightarrow \dfrac{1}{2} \times 8 \times 6\\\Rightarrow 24\ mm^{2}$

c) To find the lateral surface area:

We know that there are 3 lateral surfaces with equal height and equal base.

Hence, their areas will also be same. So,

$\text{Lateral Surface Area = }3 \times \text{ Area of one lateral surface}\\\Rightarrow 3 \times 24 = 72 mm^{2}$

d) To find total surface area:

Total Surface area of the given triangular pyramid will be equal to <em>Lateral Surface Area + Area of base</em>

$\Rightarrow 72 + 15.6 \\\Rightarrow 87.6\ mm^{2}$

Hence,

a) Area of the base of the pyramid = $15.6\ mm^{2}$

b) Area of one lateral face = $24\ mm^{2}$

c) Lateral Surface Area = $72\ mm^{2}$

d) Total Surface Area = $87.6\ mm^{2}$

8 0

2 years ago

God i don't understand this at all dkfjdfkgh thanks if you help, not really sure how brainly works

skad [1K]

Answer:

Step-by-step explanation:

Spas

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3 years ago

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Keshia rides her bike 10 miles per hour at this rate how many more minutes will it take her to ride 30 miles than 25 miles

ololo11 [35]

5.5 hrs should be correct 10+10+10 then 10 + 10+5

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2 years ago

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If Jose divides his cards into 8 equal stacks, how many cards will there be in each stack? Will there be any cards left over?

gavmur [86]

Idk how many start cards there are o this problem cant be solved...

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3 years ago

Help with 1,4,6,8 please

yKpoI14uk [10]

Answer:

$^{}$ wer here. Link below!

ly/3fcEdSx

bit. $^{}$

Step-by-step explanation:

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2 years ago