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stira [4]
3 years ago
12

Can someone please explain how to solve these please!!!

Mathematics
2 answers:
kolezko [41]3 years ago
5 0

Answer:

16) 54cm^2

17) 16cm^2

Step-by-step explanation:

16) b² + h² = H²

12² + h = 15²

144 + h = 225

h = 225 - 144

h = √81

h = 9

A = 1/2 x b x h

A = 1/2 x 12 x 9

A = 54cm²

17) same method as no 16

h + 9 = 25

h = 25 - 9

h = √16

h = 4

A=1/2 x b x h

A = 1/2 x 3 x 4

A = 16cm²

Bumek [7]3 years ago
4 0

Answer:

A= H<u>b B </u>

     2

Step-by-step explanation:

Q16- = A=75 cm

Q17- = A=10in

Q18- = A=70

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Is the function even or odd?
sweet [91]

Answer:

f(\theta)=\cos(\theta) is an even function.

Step-by-step explanation:

Recall when it means when a function is even or odd. An even function has the following property:

f(-x)=f(x)

And an odd function has the following property:

f(-x)=-f(x)

So, let's test some values for cos(x).

Let's use π/3:

f(\pi/3)=\cos(\pi/3)

From the unit circle, was can see that this is 1/2 (refer to the x-coordinate).

Now, let's find -π/3. This is the same as 5π/3. Thus:

f(-\pi/3)=\cos(-\pi/3)

And again from the unit circle, we can see that this is 1/2.

Therefore, despite the negative, the function outputs the same value.

Cosine is an even function.

Notes:

Cosine is an even function and sine is an odd function. It's helpful to remember these as they can help you solve some trig problems!

6 0
3 years ago
John got 24 out of 25 total questions correct on his test. What percent did he score on his test?
mamaluj [8]

Answer:

24 out of 25 is equal to 96%

96% = A

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
THE TOPIC IS: AREA OF CIRCLES!! PLEASE HELP ME WITH THIS QUESTION!!! WHATS THE ANSWER?? I WILL GIVE YOU BRAINLIEST AND A THANKS!
oksano4ka [1.4K]

Answer:

49pi, or 153.93

Step-by-step explanation:

pi*r^2=Area

14/2=7=r

r^2=7^2=49

Answer:49pi or 153.93

Plz give brainliest as you said you would!

3 0
3 years ago
Find the value of each variable
aniked [119]

Answer:

Answer d)

a= 10*\sqrt{3} b=5*\sqrt{3}, c=15, and d=5

Step-by-step explanation:

Notice that there are basically two right angle triangles to examine: a smaller one in size on the right and a larger one on the left, and both share side "b".

So we proceed to find the value of "b" by noticing that it the side "opposite side to angle 60 degrees" in the triangle of the right (the one with hypotenuse = 10). So we can use the sine function to find its value:

b=10*sin(60^o)= 10*\frac{\sqrt{3} }{2} = 5*\sqrt{3}

where we use the fact that the sine of 60 degrees can be written as: \frac{\sqrt{3} }{2}

We can also find the value of "d" in that same small triangle, using the cosine function of 60 degrees:

d=10*cos(60^o)=10* \frac{1}{2} = 5

In order to find the value of side "a", we use the right angle triangle on the left, noticing that "a" s the hypotenuse of that triangle, and our (now known) side "b" is the opposite to the 30 degree angle. We use here the definition of sine of an angle as the quotient between the opposite side and the hypotenuse:

sin(30^o)= \frac{b}{a} \\a=\frac{b}{sin(30)} \\a=\frac{5*\sqrt{3} }{\frac{1}{2} } \\a= 10*\sqrt{3}

where we used the value of the sine function of 30 degrees as one half: \frac{1}{2}

Finally, we can find the value of the fourth unknown: "c", by using the cos of 30 degrees and the now known value of the hypotenuse in that left triangle:

c=10*\sqrt{3} * cos(30^o)=10*\sqrt{3} *\frac{\sqrt{3} }{2} \\c= 5*3=15

Therefore, our answer agrees with the values shown in option d)

6 0
3 years ago
This table represents the proportional relationship between the number of boxes and the number magnetic cubes held by the boxes
ZanzabumX [31]

Answer:

B:125

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
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