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Nookie1986 [14]
3 years ago
6

Y = 3x + 10 y = -7x - 20

Mathematics
1 answer:
Katena32 [7]3 years ago
5 0

Answer:

x = -3

Step-by-step explanation:

3x + 10 = -7x -20

3x + 7x = -20 -10

10x = -30 /: (10)

x = -3

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Westkost [7]

Answer:

I think it's the 3rd one

Step-by-step explanation:

because it makes sense

3 0
3 years ago
What is the value of the expression All of 3.9 multiplied by 10 to the power 5 over all of 1.3 multiplied by 10 to the power 2?
Dima020 [189]
So first write out the expression:
\frac{3.9*10^{5}}{1.3*10^{2}}
take two 10's from the top to cancel with the two 10's on the bottom.
3.9/1.3 is 3.
The answer is 3*10^3
4 0
3 years ago
Need help on this question asap please
yanalaym [24]

we know, that the angle formed by an arc at the center of the circle is two times the angle formed by same arc on any point on the circumference,

So,

=》

angle \: 1 = 2 \times angle \: 2

hence, correct answer is B.

6 0
3 years ago
Help me please i have another page to due as well it’s all tiring
lutik1710 [3]

Pythagorean Theorem: a^2 + b^2 = c^2

-A and B are legs of the triangle

-C is the hypotenuse

#1.

6^2 + 8^2 = c^2

36 + 64 = c^2

100 = c^2

c = 10

#2.

5^2 + 12^2 = c^2

25 + 144 = c^2

169 = c^2

c = 13

#4.

10^2 + 4^2 = c^2

100 + 16 = c^2

116 = c^2

c = 4\sqrt{29}

#5.

15^2 + 9^2 = c^2

225 + 81 = c^2

306 = c^2

c = 3\sqrt{34}

#6.

120^2 + b^2 = 150^2

14400 + b^2 = 22500

b^2 = 8100

b = 90

#7.

144^2 + b^2 = 194^2

20736 + b^2 = 37636

b^2 = 16900

b = 130

Hope this helps!! :)

4 0
3 years ago
Can somebody help me out pleaseeee ??
nexus9112 [7]

Answer:

67.5cm^2

Step-by-step explanation:

area of a triangle is 0.5xaxb

5 0
3 years ago
Read 2 more answers
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