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olga2289 [7]
3 years ago
13

I need help on this test. Will give Brainliest to whoever answers first! Pt. 8

Mathematics
2 answers:
adelina 88 [10]3 years ago
4 0
A and H:) hope this helps
Elodia [21]3 years ago
4 0

Answer

I don’t know

Step-by-step explanation:

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Find the value of x.
Lina20 [59]

Answer:

Hi,

Step-by-step explanation:

Using Al'Kashi theorem (law of cosines),

x²=26²+19²-2*26*19*cos(31°)

x²= 190,11870690...

So

x=\sqrt{190.11870690} =13,7883540...\approx{13.8}

I hope that this is not a control.

4 0
2 years ago
1.Simplify 5 to the 5th over 5 to the 8th.
timurjin [86]
Q1. The answer is <span>1 over 5 to the 3rd power.

</span>5 to the 5th is 5⁵
5 to the 8th is 5⁸
5 to the 5th over 5 to the 8th is \frac{ 5^{5} }{ 5^{8} }
To simplify, we will use two rules: 
\frac{ x^{a}}{ x^{b} } = x^{a-b} \\ x^{-a} = \frac{1}{ x^{a}}
Therefore:
\frac{ 5^{5} }{ 5^{8} } = 5^{5-8} =5^{-3}= \frac{1}{5^{3}}
\frac{1}{5^{3}} is the same as 1 over 5 to the 3rd power.


Q2. The answer is <span>(53)−4.

The exponents are multiplied when are expressed in the form:
</span>(x^{a}) ^{b}= x^{a*b}
So, (5^{3} )^{-4}=5^{3*(-4)}=5^{-12}

Other choices are incorrect:
<span>one third to the 4th times one third to the 7th is </span>( \frac{1}{3} )^{4} *( \frac{1}{3} )^{7}=( \frac{1}{3} )^{4+7}
3 to the 7th over 3 to the 15th is \frac{ 3^{7} }{3^{15}} =3^{7-15}
<span>45 ⋅ 42 is </span>4^{5}* 4^{2} =  4^{5+2}
3 0
3 years ago
Read 2 more answers
What is the length and width of a room that is 60 square meters and has a perimeter of 32 meters
AleksAgata [21]
L = lenght
W = width

L * W = 60 \\&#10;2L + 2W=32\\\\&#10;L = \frac{32-2W}{2}\\&#10;\frac{32-2W}{2}*W = 60\\&#10;(16-W)*W = 60\\&#10;-W^{2} + 16W -60 = 0\\\\&#10;&#10;d = 16^{2} - 4*1*60 =  256 - 240 = 16 \\\\&#10;W1 = \frac{-16+\sqrt{16}}{-2} =  \frac{-12}{-2} = 6\\&#10;W2 = \frac{-16-\sqrt{16}}{-2} =  \frac{-20}{-2} = 10\\&#10;&#10;L1 = 10\\&#10;L2 = 6\\&#10;

so

{L,W} = {6,10} or {10,6}

but L > W  so

L = 10
W = 6
7 0
3 years ago
Omg my daughter and I are totally lost on this homework. Please help. It is multiplying decimals. She has to turn this in today.
Wewaii [24]

Answer:

5 x 0.6 = 5 x 6tenths, as 6/10 = 0.6

= 30 tenths

7 x 0.8 = 7 x 8tenths, as 8/10 is 0.8

= 56 tenths

Step-by-step explanation:

If you really want a more detailed explanation, just reply to this message.

5 0
3 years ago
What are the coordinates of point F
densk [106]

Answer:

(4,-2.5)

Step-by-step explanation:

first one is x cordination...it is under the 4

second one is Y cordination..its between -2 and -3

If you understand my answer.mark me as Brainliest...If not...Mark me as BrAiNlEss...☺️

3 0
3 years ago
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