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Lera25 [3.4K]
3 years ago
15

What's the area for number 5 and 6

Mathematics
1 answer:
lapo4ka [179]3 years ago
3 0
So to find the area of a Triangle you want to use the equation:

A=B*H/2.

So for the base we use 18 and for the Height we use 8.

Then just do the equation. A=18*8/2=72in.

So to find the area of a Trapezoid you want to use the equation:

A=1/2h(b₁+b₂)

So the numbers we will be using is: 7,7,15.

Put the numbers in the equation: A=1/2(7)(7+15).

Then just do the equation. A=1/2(7)(7+15)=77yards
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The sales tax for a certain state can be found by multiplying the purchase price by 1/20 . What is the sales tax on an item that
Nuetrik [128]
The answer is $1.28 sale tax
Step-by-step explanation:
Multiply the cost of the item times 0.05 to get the amount of the sales tax:
25.60 * 0.05 = $1.28 sales tax
5 0
3 years ago
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Is it ok you guys maybe do this one too sorry...<br> (−6)(−0.4)(−0.5)
olchik [2.2K]
(-6)(-0.4)(-0.5) = (-1)6⋅4⋅5⋅10⁻² = -1.2
5 0
3 years ago
Solve the simultaneous equations:<br><br> 5x + 3y = 9<br> 7x - 2y = 25<br><br> x=__<br> y=__
kondor19780726 [428]

Answer:

x= 3, y= -2

Step-by-step explanation:

5x+3y= 9

x= 25÷7 + 2÷7 y

5(25÷7 +2÷7 y)

5( 25÷7 +2÷7 y ) + 3y= 9

y= -2

x= 25÷7 + 2÷7 x (-2)

x= 3

5 0
3 years ago
The leaning tower of Pisa currently "leans" at a 4 degree angle and has a vertical height of 55.86 meters. How tall was the lean
Marizza181 [45]

Answer:

56 meters.

Step-by-step explanation:

Please find the attachment.

Let the leaning tower's be h meters tall, when it was originally built.

We can see from our attachment that the side with length 55.86 meters is hypotenuse and h is adjacent side for 4 degree angle.

Since we know that cosine relates the adjacent and hypotenuse of a right triangle.

\text{Cos}=\frac{\text{Adjacent}}{\text{Hypotenuse}}

Upon substituting our given values we will get,

\text{Cos (4)}=\frac{55.86}{h}

h=\frac{55.86}{\text{Cos (4)}}

h=\frac{55.86}{0.99756405026}

h=55.996\approx 56                      

Therefore, the leaning tower was approximately 56 meters, when it was originally built.

6 0
3 years ago
Earth travels around the sun at a speed of about 30 kilometers per second. Convert this speed to kilometers per minute.
Verizon [17]

Answer:

1800

Step-by-step explanation:

there are 60 seconds in a minute

so, 30 * 60 = 1800

8 0
3 years ago
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