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Kipish [7]
3 years ago
11

What is the x-coordinate of the solution to the system of equations? {3x+2y=3 2x−2y=7

Mathematics
1 answer:
n200080 [17]3 years ago
6 0
Hello
<span>3x+2y=3 ....(1)
2x−2y=7 ..... (2)
(1)+(2) : 5x = 10        x=10/5 =2



</span>
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Multiply and give the answer in scientific notation: (2.3 x 10-3)(3 x 108) A) 6.9 x 105 B) 6.9 x 1011 C) 6.9 x 10-5 D) 6.9 x 102
Furkat [3]

Answer: A) is the right answer. 6.9\times10^{5}


Step-by-step explanation:

Given product : 2.3\times10^{-3}\times3\times10^8

To multiply above expression, first we need to combine like terms and then we need to use the law of exponents.

2.3\times3\times10^{-3}\times10^8\\=(2.3\times3)\times(10^{-3}\times10^8)\\=6.9\times10^{-3+8}......[\text{by law of exponents }a^n\cdot\ a^m=a^{m+n}]\\=6.9\times10^{5}

Thus, the answer is 6.9\times10^{5}.


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3 years ago
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Answer:

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Step-by-step explanation:

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Answer:

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4 0
3 years ago
Read 2 more answers
Jamal draws triangle XYZ. If angle X=46 degrees, XZ = 10 degrees, and YZ=8 degrees, what is the approximate length of XY?
Mashutka [201]
<span>In triangle XYZ,
angle X=46 degrees,
XZ = 10 units and
YZ=8 units.

We will find the length of XY using cosine rule:

According to cosine rule:

a² = b² + c² - 2bc cosA (the figure is attached)
Here, A = 46 degree.
a = 8 units.
b <span>= ?
</span>c = 10 units.
</span>⇒  b² = c² - a² -2bc cosA
⇒  b² = 100 - 64 - 160*cos(46)
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⇒  b² = 100 - 64 - 110.4
⇒  b² = 100 - 64 - 110.4
⇒ b² = 74.4
or b = 8.62 units.
or b = 8 untis approximately. 

5 0
3 years ago
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If a four sided figure has four right angles, then it has four congruent sides. Prove it wrong.
nekit [7.7K]
A rectangle is a four sided figure with four right angles but it does not have congruent sides because two of its sides are longer than the other two.
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