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Brums [2.3K]
3 years ago
12

Pls help me**will give brainlest answer**

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

Answer:

S = 4

Step-by-step explanation:

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You flip a coin 30 times, about how many times would you expect to tails to appear?
IceJOKER [234]

Answer:15

Step-by-step explanation:

15 times because its half the time

5 0
3 years ago
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10x^3 y^-5 z^-2 if x=3 y=2 and z=5 express your answer as a reduced fraction
sineoko [7]

Answer:

\large\boxed{\dfrac{27}{80}}

Step-by-step explanation:

Put x = 3, y = 2 and z = 5 to the given expression 10x^3y^{-5}z^{-2}:

10(3^3)(2^{-5})(5^{-2})\qquad\text{use}\ a^{-n}=\dfrac{1}{a^n}\\\\=\dfrac{10(27)}{(2^5)(5^2)}=\dfrac{270}{(32)(25)}=\dfrac{270}{800}=\dfrac{27}{80}

7 0
3 years ago
@mehek14
gayaneshka [121]
X=cost per hamburgurs
y=cost per hot dog

200x+150y=1450
200x+250y=1750

we can multiply first equation by -1 and add to 2nd

-200x-150y=-1450
<u>200x+250y=1750 +</u>
0x+100y=300

100y=300
divide both sides by 100
y=3

sub back

200x+150y=1450
200x+150(3)=1450
200x+450=1450
minus 450 both sides
200x=1000
divide both sides by 200
x=5


the cost of a hamburgur is $5
the cost of a hot dog is $3
8 0
3 years ago
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What is an equivalent expression for 7times plus 56.
krok68 [10]
<em>t would be 8 if you are multiplying .</em>
7 0
4 years ago
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QUESTION 1: simplify 18-24÷8+7
bearhunter [10]

Answer:

1. 22

2.73

3.15

Step-by-step explanation:

7 0
3 years ago
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