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Marianna [84]
3 years ago
13

Help - I don’t understand this please help

Mathematics
1 answer:
expeople1 [14]3 years ago
5 0

Step-by-step explanation:

have you taken the picture from the PC which website is this is tell me

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Evaluate 7h + 3, if h = 2
REY [17]

Answer:

17

Step-by-step explanation:

7h+3

7(2)+3

14+3

=17

7 0
3 years ago
Someone please tell me which triangles are similar
White raven [17]

Answer:

The two triangles to the right with the angle measures 53 and 37.

Step-by-step explanation:

We first need to make an equation that we can use to find the value of X. since we know that the interior angles of a triangle add up to 180 degrees we can create this,

2x-21+x+90=`180

In order to solve this, we need to isolate the variable. We can do this by adding 21 to each side then subtracting 90 from each side,

3x=111

next, we divide 11 by 3 to get the value of x alone.

x=37

we can now plug ex in to find the measures of the angles. when we do that we see the angles measure 90,37, and 53 degrees. these values match with the angle measure of the two triangles on the right side of the picture.

6 0
3 years ago
(3cosx-4sinx) + (3sinx+4cosx) = 5
Ksenya-84 [330]
(3 cos x-4 sin x)+(3sin x+4 cos x)=5
(3cos x+4cos x)+(-4sin x+3 sin x)=5
7 cos x-sin x=5
7cos x=5+sin x
(7 cos x)²=(5+sinx)²
49 cos²x=25+10 sinx+sin²x
49(1-sin²x)=25+10 sinx+sin²x
49-49sin²x=25+10sinx+sin²x
50 sin² x+10sinx-24=0

Sin x=[-10⁺₋√(100+4800)]/100=(-10⁺₋70)/100
We have two possible solutions:
sinx =(-10-70)/100=-0.8
x=sin⁻¹ (-0.8)=-53.13º      (360º-53.13º=306.87)

sinx=(-10+70)/100=0.6
x=sin⁻¹ 0.6=36.87º

The solutions when  0≤x≤360º are:  36.87º and 306.87º.


3 0
3 years ago
If you run a mile in 12 minutes, how fast are you running in miles per hour?
BaLLatris [955]
5 miles per hour. work is 60÷12= 5.
6 0
3 years ago
Read 2 more answers
Help please will give brainliest PLEASE<br><br><br>I accidentally chose that​
kherson [118]

Answer:

I think its the third one but i might be wrong

Step-by-step explanation:

5 0
3 years ago
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