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3 years ago

Will anyone help me my brain cells are lazy right now

Mathematics

2 answers:

kolbaska11 [484]3 years ago

7 0

3/1 is the answer because Reduce the numbers with the greatest common factor and thats 4 so its 3

IgorC [24]3 years ago

6 0

Answer:

<em> $\frac{1}{4} - \frac{1}{12}$ </em>

to make denominators same multiply 1/4 by 3 both up and down :

$= \frac{1 \times 3}{4 \times 3} - \frac{1}{12} \\ = \frac{3}{12} - \frac{1}{12} \\ = \frac{2}{12} \\ = \frac{1}{6} \: (ans)$

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Sean paints 8/15 of a fence in 1 hour. He paints 3/10 of the fence less in the second hour. What fraction of the fence did he pa

a_sh-v [17]

Answer: $\frac{3}{10}$

Step-by-step explanation:

Given

Sean paints $\frac{8}{15}$ of a fence in 1 hour

Sean paints $\frac{3}{10}$ part less in the second hour

So, fraction he paints in the second hour = $\frac{8}{15}-\frac{3}{10}=\frac{16-9}{30}=\frac{7}{30}$

Paint in 2 hours = $\frac{8}{15}+\frac{7}{30}=\frac{16-7}{30}=\frac{9}{30}$

= $\frac{3}{10}$

No, he did not finish his job

7 0

3 years ago

maria needs to fill a empty storage container with wooden cubes measuring 2 cm across each face.The container is in the shape of

ch4aika [34]

I think its 125, because you can fit 5 cubes across, 5 cubes from one side to the other side, and you can stack 5 cubes up so 5*5*5= 125

7 0

3 years ago

Im not smart, can someone pls help me?

Nataliya [291]

Answer:

13- No because the size of the triangle can be different, meaning bigger side length

in 14 he is forgetting the lines at the angles. The little circular ones that say the angles are congruent.

Step-by-step explanation:

5 0

3 years ago

Evaluate 24 - 4t for t = 4

NeX [460]

The answer is 16 because you have to solve for T which is 4 So you will multiply 4 times 4 because T is for 4 and you had to put parentheses around 4...4×4 is eight and you have to subtract 24-8 and it will give you 16

3 0

3 years ago

For a binomial distribution with p = 0.20 and n = 100, what is the probability of obtaining a score less than or equal to x = 12

notsponge [240]

The binomial distribution is given by,
P(X=x) = $(^{n}C_{x})p^{x} q^{n-x}$
q = probability of failure = 1-0.2 = 0.8
n = 100
They have asked to find the probability <span>of obtaining a score less than or equal to 12.
</span>∴ P(X≤12) = $(^{100}C_{x})(0.2)^{x} (0.8)^{100-x}$
where, x = 0,1,2,3,4,5,6,7,8,9,10,11,12
∴ P(X≤12) = $(^{100}C_{0})(0.2)^{0} (0.8)^{100-0} + (^{100}C_{1})(0.2)^{1} (0.8)^{100-1}$ + $(^{100}C_{2})(0.2)^{2} (0.8)^{100-2} + (^{100}C_{3})(0.2)^{3} (0.8)^{100-3}$ + $(^{100}C_{4})(0.2)^{4} (0.8)^{100-4} + (^{100}C_{5})(0.2)^{5} (0.8)^{100-5}$ + $(^{100}C_{6})(0.2)^{6} (0.8)^{100-6} + (^{100}C_{7})(0.2)^{7} (0.8)^{100-7}$ + $(^{100}C_{8})(0.2)^{8} (0.8)^{100-8} + (^{100}C_{9})(0.2)^{9} (0.8)^{100-9}$ + $(^{100}C_{10})(0.2)^{10} (0.8)^{100-10} + (^{100}C_{11})(0.2)^{11} (0.8)^{100-11}$ + $(^{100}C_{12})(0.2)^{12} (0.8)^{100-12}$

Evaluating each term and adding them you will get,
P(X≤12) = 0.02532833572
This is the required probability.

7 0

4 years ago