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3 years ago

.

Mathematics

2 answers:

borishaifa [10]3 years ago

6 0

Answer:

x=3

y=2x

y= 2×3

y=6

option a is the answer

prisoha [69]3 years ago

3 0

The answer is 6! Multiply 2 x 3 because x = 3 and you will get 6, which is y.

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What is 1/4b=-3 in linear equations

Nutka1998 [239]

1/4b=-3

Solve for b

1/4b *4 = -3*4
b = -3 *4
b = -12

Answer: b = -12

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3 years ago

What is -5/4×1/3 and how do you solve fractions??

kolbaska11 [484]

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3 years ago

Find the product mentally. (ab + 3)2 ab2 + 6ab + 9 2ab + 6 a2b2 + 6ab + 9

Contact [7]

I think it's a^2 b^2 + 6ab + 9

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3 years ago

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Scores on a certain intelligence test for children between ages 13 and 15 years are approximately normally distributed with μ=10

Tju [1.3M]

Answer: 0.8238

Step-by-step explanation:

Given : Scores on a certain intelligence test for children between ages 13 and 15 years are approximately normally distributed with $\mu=106$ and $\sigma=15$ .

Let x denotes the scores on a certain intelligence test for children between ages 13 and 15 years.

Then, the proportion of children aged 13 to 15 years old have scores on this test above 92 will be :-

$P(x>92)=1-P(x\leq92)\\\\=1-P(\dfrac{x-\mu}{\sigma}\leq\dfrac{92-106}{15})\\\\=1-P(z\leq })\\\\=1-P(z\leq-0.93)=1-(1-P(z\leq0.93))\ \ [\because\ P(Z\leq -z)=1-P(Z\leq z)]\\\\=P(z\leq0.93)=0.8238\ \ [\text{By using z-value table.}]$

Hence, the proportion of children aged 13 to 15 years old have scores on this test above 92 = 0.8238

4 0

3 years ago

X = -1+y

gtnhenbr [62]

Answer:

y = 2

Step-by-step explanation:

x= -1+y

2x-y=0

2(-1+y)-y=0

-2+2y-y=0

-2+y=0

-2+2+y=0+2

y=2

hope it's helpful ❤❤❤❤

THANK YOU.

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3 years ago

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