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zheka24 [161]
3 years ago
10

INCREDIBLY URGENT!!

Mathematics
1 answer:
Gemiola [76]3 years ago
3 0

Answer:

When you see a formula like this, try to operate, so you will see some identities sooner or later. In this case, we have a substraction identity:

\frac{cos ( \alpha  -  \beta )}{cos  \alpha cos  \beta }  =  \frac{cos   \alpha cos  \beta + sin \alpha sin  \beta }{cos  \alpha cos  \beta }  = 1 + tan α · tan β

Step-by-step explanation:

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Solve for<br> 6(x + 2) = -72<br> X=
Aneli [31]

Answer:

x= -14

Step-by-step explanation:

6(x+2)=-72

(you can use the distribution property)

6x+12=-72

     -12     -12

6x=-84

/6    /6

x= -14

6 0
3 years ago
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Find an ordered pair (x,y) that is a solution to the equation 5x+y=7
IRINA_888 [86]

Answer:

54565656

Step-by-step explanation:

ggfght

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3 years ago
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The cake store is having a 10%, percent off sale on all of its cakes. If the cake you want regularly costs $6, how much would yo
sleet_krkn [62]
Here is a pro tip! When taking 10% of anything move the decimal back ONCE. The number you get is 10% of that number. You then take that number and subtract it by your original number if you want to know how much it will cost if it was 10% off. 

The reason why that works is because to take 10% of something you would need to multiply it by 0.1, which is the same as 1/10 (which is also the same as dividing the number by 10). 

So you take 10% of $6.00. It's $0.60. 
Subtract that from your original amount.

 $6.00
-$0.60

I'll let you do that one, but the answer comes out to be: 

$5.40

Now to answer the question of this problem (the previous steps were if they asked for the price, but in this case you could've stopped at the 10% part) 

You save $0.60.
3 0
4 years ago
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Find mDCAˆ. the question says that the angle is 3x+19 the smaller arc is 91 and the bigger is 17x-3 it is one of those problems
valina [46]

Answer: Option C.

Step-by-step explanation:

Let as consider the below figure is attached below.

We know that angle between tangent and secant is half of difference of major and minor arcs.

\angle ABC=\dfrac{arc(AD)-arc(AC)}{2}

3x+19=\dfrac{17x-3-91}{2}

Multiply both sides by 2.

6x+38=17x-94

38+94=17x-6x

132=11x

Divide both sides by 11.

12=x

The value of x is 12.

arc(AD)=17(12)-3

arc(AD)=204-3

arc(AD)=201^{\circ}

Now,

arc(DCA)=360^\circ-arc(AD)

arc(DCA)=360^\circ-201^{\circ}

m\widehat {DCA}=159^{\circ}

Therefore, the correct option is C .

5 0
3 years ago
in a class there are 40 students. There are 10 more boys than girls in the class, Let x be the number of boys and y be the numbe
belka [17]
X = boys
y = girls

x + y = 40 (in a class there are 40 students)
x = y + 10 (t<span>here are 10 more boys than girls in the class</span>)
5 0
4 years ago
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