MATHEMATICS MIDDLE SCHOOL

Quien quiere ser mi amigo por favor ?

Cuantos es 5+5

Answers

Answer 1
Answer: 5+5= 10
por que 5 +5 es diez
Answer 2
Answer: 5+5= es 10.,,,,,, ,,,

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4 √(40) + 7 √(160)
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Answers

Answer:

Step-by-step explanation:

44√(40) + 7 √(160) = 4√(2*2*2*5)  + 7√(4*4*5*2)\n  = 4*2√(10)  + 7*4√(10)\n = 8√(10) + 28√(10) \n

= (8 + 28)√10

= 36√10

Answer:

36√(10)

Step-by-step explanation:

Using the rule of radicals

√(a) × √(b) ⇔ √(ab)

Simplifying the radicals in the expression

√(40)

= √(4(10))

= √(4) × √(10) = 2√(10)

√(160)

= √(16(10))

= √(16) × √(10) = 4√(10)

Thus

4√(40) + 7√(160)

= 4 × 2√(10) + 7 × 4√(10)

= 8√(10) + 28√(10)

= 36√(10)

Can both number be negative? if yes give an example

Answers

yes they can.
for example if you have - 7 + - 8=- 15 the rule for adding/subtracting is that when you have two negative you add and keep the negative sign. When you multiply/divide the two negative makes the answer become positive for example - 5 × - 7 = 35 or when you divide - 6 ÷ - 3 = 2.

a bucket holds 243.5 oz of water. The bucket loses 0.3 oz of water per second.In how many seconds will the bucket be 40% full

Answers

ok so 
t=time in seconds
therefor the smount lost for t seconds is 0.3 ties t or 0.3t
loss so it is ngative
-0.3t
the question is
243.5-0.3t=40% of 243.5
first, find 40% of 243.5
percent means partst out of 100 so 
40%=40/100=0.4
'of' means multiply
40% of 243.5=0.4 ties 243.5=97.4
now the question is
243.5-0.3t=97.4
for ease, multiply whole equation by 10 to make no decimals
2435-3t=974
subtract 2435 from b oth sides
-3t=-1461
divide both sides by -3
t=487

answer is 487 seconds (aka 8 mins, 7 secons)

answer is 487 sseconds

Answer:

487 seconds

Step-by-step explanation:

Ur welcome TEEHEE

Which fraction is closer to 1 than to 0

Answers

any thing equal to or greater than two thirds (2/3)

Find the value of x.
A) 21
B) 27
C) 31
D) 34

Answers

Answer: A) 21

Step-by-step explanation:

From the given figure, we can see that angles 64^(\circ) and (3x+1)^(\circ) are vertically opposite angles.

Since, vertically opposite angles are equal, therefore we have

64^(\circ)=(3x+1)^(\circ)\n\n\Rightarrow64=3x+1\n\n\text{Subtract 1 on both sides, we get}\n\n\Rightarrow3x=63\n\n\text{Divide 3 on both sides, we get}\n\n\Rightarrow x=21

Hence, the value of x = 21.
The answer is a, 21. 21x3 is 63. 63 + 1 = 64.

7) Drawing 2 cards that are all 8 from a deck of cards? __________

Answers

ok so a deck has 52 cards

there are 4 suits so there are 4 cards with 8 on them (8 of clubs, hearts, spades, diamonds)

so
probability is
(desired ourcome)/(total possible)
you have 4 chances ouut of 52 for picking a 8 on the first try
on the second try, you have a 3 out of 51 (assuming you picked an 8 first and you didn't replace it)

multiply them since they are dependent on each ohter
4/52 times 3/51=12/2652=1/221

probability is 1/221
thats statistics and probablilities :D hope that helped
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