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lianna [129]
3 years ago
7

Ok guys i need some help

Mathematics
1 answer:
Strike441 [17]3 years ago
5 0
Hello!

The surface area is the area of all of the shapes on the net added up. First we will find the area of the two triangles.

A=0.5bh
A=0.5(3·6)
A=0.5(18)
A=9

Since there are two triangles we double this area, giving us 18.

Now let's find the length of the two side rectangles.

7(4)=28
28+28=56

Now to find the middle rectangle.

6(7)=42

Now we add up all of the area to find the surface area.

42+56+18=116

The surface area is 116 cm².

I hope this helps!
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A trolley company charges a fixed amount plus a fee based on the distance traveled. The cost chart for the company is shown:
Liula [17]

Answer: $6

Step-by-step explanation:

Given: A trolley company charges a fixed amount plus a fee based on the distance traveled.

If y represents cost (dollars) charged by the company for x distance traveled  (miles) .

then y=mx+c represents the total cost where c is the fixed charge and m is the fee for the distance traveled.

From, table we can see when x=0, y=6.

\\\Rightarrow\ 6=0+c\\\Rightarrow\ c=6

Hence, the fixed fee charged by the company is $6.

3 0
3 years ago
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At the cafeteria, sandwiches all cost the same amount. Mr. S. buys 2 turkey sandwiches, and a juice for $.75. Mr. B buys three r
Vika [28.1K]
The sandwich is .20 because the milk will be .10 and the sandwiches are for 20 so 20+20=40, 40+10=50 I hope this helps you
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3 years ago
Given: △ABC, m∠A=60°,<br> m∠C=45°, AB=9<br> Find: Perimeter of △ABC,<br> Area of △ABC
stellarik [79]

Answer:

Perimeter of ΔABC: \frac{27}{2} + \frac{9}{2} * \sqrt6 units

Area of ΔABC: \frac{81}{8}*\sqrt3 + \frac{243}{8} units

<u>Skills required: HS Geo, Special Triangles</u>

Step-by-step explanation:

1) The best option is to break down this triangle. Let's draw an altitude from Point B down to Segment AC. The point from the altitude that intersects AC is Point D. BD is the height of our triangle, AC is the base.

2) Angle A is 60 degrees, and since Angle BDA is 90 degrees, Angle ABD is 30 degrees. We can use the 30-60-90 degree right triangle property for the triangle BDA.

  • This states that if the side opposite the 30 degree angle is x, the side opposite the 60 degree angle is x*\sqrt3, and the side opposite the 90 degree angle is 2x.

AB is 9 units, and it is opposite the 90 degree angle. This means that 2x=9, x = \frac{9}{2} ==> This then means that AD, the segment opposite the 30 degree angle in this triangle is \frac{9}{2} units. Segment BD (the height) is \frac{9}{2} * \sqrt3.

3) Angle C is 45 degrees, and Angle BDC is 90 degrees, which means that Angle CBD is 45 degrees. We can use the 45-45-90 degree right triangle property for the triangle BCD.

  • This states that if the side opposite the 45 degree angle is x, the other side opposite a 45 degree angle is also x, but the hypotenuse (side opposite the right (90 degree) angle) is \sqrt{2}*x.

BD is \frac{9}{2} * \sqrt3, which means DC is the same. BC, which is the hypotenuse is BD multiplied by square-root-2, which is \frac{9}{2} * \sqrt6.

4) Area is \frac{1}{2}*b*h, the base (b) is AC (which is \frac{9}{2}+\frac{9}{2}*\sqrt3), the height is BD (\frac{9}{2}*\sqrt3). When multiple you will get \frac{81}{4}*\sqrt3 + \frac{243}{4}, then this multiplied by 1/2 is

\frac{81}{8}*\sqrt3 + \frac{243}{8} <--> this is the area!

5) Perimeter is just the sum of all side: 9 + \frac{9}{2} + \frac{9}{2} * \sqrt6 = \frac{27}{2} + \frac{9}{2} * \sqrt6 unit

6 0
3 years ago
Select all the equations where r 3 is a solution.​
lozanna [386]

Answer:

The right answers are 1,4 and 6

6 0
3 years ago
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Help me please I need help
zaharov [31]

Answer:

7 ÷ 5

Step-by-step explanation:

1/5 of 7 is equal to 1/5 times 7/1, which will simplify to 7/5, or 7 ÷ 5.

5 0
3 years ago
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