MATHEMATICS MIDDLE SCHOOL

I've been trying for 3 hours to answer these problems please help!! Find the value of the square root to the nearest tenth for the numbers:
77, 23, 31, 46, 9, 53, 108, and 10

Answers

Answer 1
Answer:

Answers:

77 = 8.8

23 = 4.8

31 = 5.6

46 = 6.8

9 = 3

53 = 7.3

108 = 10.4

10 - 3.2

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Two fair dice are tossed.a. What is the probability that the sum of the number of dots shown on the upper faces is equal to 7? To 11?b.What is the probability that you roll "doubles" that is, both dice have the same number on the upper face?c. What is the probability that both dice show an odd number?

What two numbers add up to 1 but multiply to -30

Answers

x;\ y-the\ numbers\n\n \left\{\begin{array}{ccc}x+y=1&\to x=1-y\nxy=-30\end{array}\right\n\nsubtitute\ x=1-y\ to\ second\ equation:\n\n(1-y)y=-30\ny-y^2+30=0\n-y^2+y+30=0\ \ \ \ \ |change\ signs\ny^2-y-30=0\ny^2-6y+5y-30=0\ny(y-6)+5(y-6)=0\n(y-6)(y+5)=0\iff y-6=0\ or\ y+5=0\n\Downarrow\ny=6\ or\ y=-5

x=1-y\n\nfor\ y=6\Rightarrow x=1-6=-5\n\nfor\ y=-5\Rightarrow x=1-(-5)=1+5=6\n\n=======================================\nAnswer:\boxed{6}\ and\ \boxed{-5}

The longest side of an isosceles obtuse triangle measures 20 centimeters. The other two side lengths are congruent but unknown.

Answers

Am I supposed to be figuring out what the length of the two other legs are?
180-20= 160. Split 160 in half, which is 80, and that's your answer.

What is the equation for x=-3 and y=-7

Answers

Answer:

-7 = -3x + b

Step-by-step explanation:

i'm guessing because you have not provided a visual so i can not determine the B.

Nam has a bag of 8 chips numbered 1 to 8. He will perform an experiment to model the theoretical probability of pulling a chip with the number 6.Select from the drop-down menus to correctly complete the sentences.
Nam should pull a chip and replace it after each turn
A. as many times as possible
B. 8 times

, and then divide the number of times 6 occurs by
A. 8
B. the number of trials

. After many trials, the experimental probability will be close to the theoretical probability of
A. 1/8
B. 2/3
C. 1/6
.

Answers

Answer:

1. A

2. B

3. A

Step-by-step explanation:

He should conduct the experiment as many times as possible, more the better estimate can be obtained.

Record the no. of 6's and divide the no. of trials to get an estimate of the probability of 6

After many trials, the experimental probability would get closer and closer to the theoretical probability which is 1/8
B is the correct answer I believe

Arnie's car used 100 cups of gasoline during a drive.He paid $3.12 per gallon of gas.How much did the gas cost?

Answers

There are 16 cups in a gallon. Divide 100 into 16 to get 6.25. You now just multiply 3.12 by 6.25 to get 19.5. Your answer is $19.50. Hope this helps!

The length of rectangle is 7.1 cm and breadth 2.5 cm what is the area of rectangle

Answers

Step-by-step explanation:

Area \: of \: rectangle \n = lenght * breadth \n = 7.1 * 2.5 \n = 17.75 \: {cm}^(2) \n
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