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Gelneren [198K]
3 years ago
13

Please help me with these questions! Can I have fully shown work for both, and the directions say to find the surface area of th

e piracies thanks.

Mathematics
2 answers:
mixas84 [53]3 years ago
6 0
Start with the bottom, which is a 5 by 5 square, and you get 25ft^2 or square feet
Then the four sides. The area for a triangle is 1/2 base*height.
5*8 is 40/2=20
There are four of these sides so 20*4=80. 
Add this to the bottom and you get 80+25=105 square units
Vera_Pavlovna [14]3 years ago
5 0
5.

I think you mean pyramids so
surface area
there are triangles on the faces of the pyramids so 1/2BH=SA of 1 of the side so for the whole side
surface are of each side=BH
B=5
H=8
(5)(8)(1/2)=20
4 sides
(4)(20)=80= top surface area

the surface are of the base
(5)(5) =25
25+80=105 sq units
 

I can't see 6 or 7 so I'm done
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Makovka662 [10]

Answer:

Therefore,

BC=a=10\ units\\\\AC=b=13.66\ units

Step-by-step explanation:

Consider a Δ ABC with

m∠ A = 45°

m∠ C = 30°

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BC = a = ?

AC = c = ?

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In a Triangle sum of the measures of all the angles of a triangle is 180°.

\angle A+\angle B+\angle C=180\\\\45+30+\angle B=180\\\ttherefore m\angle B =180-75=105\°

We know in a Triangle Sine Rule Says that,

In Δ ABC,

\frac{a}{\sin A}= \frac{b}{\sin B}= \frac{c}{\sin C}

substituting the given values we get

\frac{a}{\sin 45}= \frac{b}{\sin 105}= \frac{5\sqrt{2} }{\sin 30}

∴ \frac{a}{\sin 45}= \frac{5\sqrt{2} }{\sin 30}\\\\a=\sin 45\times \frac{5\sqrt{2} }{\sin 30}\\\\a=\frac{1}{\sqrt{2} }\times \frac{5\sqrt{2} }{0.5} \\\\\\a=\frac{5}{0.5} =10\\\therefore BC = a = 10\ units

Similarly for 'b',

\frac{b}{\sin 105}= \frac{5\sqrt{2} }{\sin 30}\\\frac{b}{0.9659}= \frac{5\sqrt{2} }{0.5}\\\\b=0.9659\times \frac{5\sqrt{2} }{0.5}\\\\b=\frac{6.8301}{0.5} \\\\b=13.66\\\therefore AC = b =13.66\ units\\

Therefore,

BC=a=10\ units\\\\AC=b=13.66\ units

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B

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Suppose the Bainters purchase the $150,000.00 home with a 20% down payment, a 30-year mortgage, and an interest rate of 4.2%. An
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Linda and Juan went shopping. Linda spent $14 less than Juan. If we let y represent how much Juan spent, write an algebraic expr
algol13

Answer:

An Algebraic expression representing amount spent by Linda is y-14.

Step-by-step explanation:

Given:

Let the amount spent by Juan be 'y'

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Linda spent $14 less than Juan.

We need to find an algebraic expression for how much Linda spent.

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