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Delvig [45]
3 years ago
9

Can someone help me on number one plz. Help me by explaining the steps ;D

Mathematics
2 answers:
SVETLANKA909090 [29]3 years ago
5 0
It's easy since all the variables have a after them they can be added and subtracted together.

15a-9a=6a
6a+20a=26a
26a-12a=14a
The simplest form is 14a <span />
harina [27]3 years ago
3 0
0+1=1 
1-0=1
1x1=1
1/1=1
1 is in everything if this didnt help tell me
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State whether the given measurements determine zero, one, or two triangles. b=86, b=21, c=18
hammer [34]

Answer: 1

Step-by-step explanation:

I assume you meant to type B=86^{\circ}, b=21, c=18.

By the Law of Sines,

\frac{\sin C}{c}=\frac{\sin B}{b} \\ \\ \frac{\sin C}{18}=\frac{\sin 86^{\circ}}{21} \\ \\ \sin C=\frac{18 \sin 86^{\circ}}{21} \\ \\ C=\sin^{-1} \left(\frac{18 \sin 86^{\circ}}{21} \right), 180^{\circ}-\sin^{-1} \left(\frac{18 \sin 86^{\circ}}{21} \right) \\ \\ C \approx 58.77^{\circ}, 121.23^{\circ}

Since only one of these values will make a triangle (the obtuse possibility for C will mean B+C > 180^{\circ}, which violates the condition that the angles of a triangle add to 180 degrees), 1 triangle can be formed.

8 0
2 years ago
Please help fast!!!!<br><br> Fill in all the blanks
Nastasia [14]

Answer: Look below

Step-by-step explanation:

2(2x-4y) = 4

1(-4x+6y)= -4

4x-8y=4

-4x-6y=-4

-14y=0

y=0

(Hopefully that helps!!)

7 0
3 years ago
2 employees share 1 job. A girl works Monday Wednesday and Fridays. A boy works Tuesdays and Thursdays. The job pays an annual s
luda_lava [24]
I would think $<span>14,301. If is is a shared salary then just divide by two since there are two people.</span>
8 0
3 years ago
What is 25 % of 200?
SVETLANKA909090 [29]
The answer is 50.

Hope this helped!
5 0
3 years ago
Read 2 more answers
What Multiple Of 7 is less than 45 but greater than 40? A.41 B. 42 C.43 D.44
vovikov84 [41]

Answer:

The correct answer is B, 42.

Step-by-step explanation:

In order to know the answer to the given question, the following logical reasoning has to be made:

The multiple number of 7 that is less than 45 but greater than 40 is 42. This is so since 42 is the result of multiplying 7 by 6 (7 x 6 = 42). In turn, 7 multiplied by 5 is equal to 35 (7 x 5 = 35), which does not exceed the number 40, while 7 multiplied by 7 is equal to 49, which is not less than 45 (7 x 7 = 49).

7 0
3 years ago
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