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Reptile [31]
3 years ago
10

Rewrite -3- (-4) as an addition equation. Your answer answer​

Mathematics
1 answer:
andriy [413]3 years ago
3 0

Answer:

-3 + 4 = 1

Step-by-step explanation:

Minus with minus makes a positive.

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scores for a qualification exam are nromally distibuted, with a mean of 80 and a standard deviation of 10. to be qualfiied for a
Nesterboy [21]

Lowest score earned to be qualified for an interview is 92.82

X : Marks scored in interview

X ~ N(80,100)

Here we need to find x such that P(X > x) = 0.10

using standard normal table,

we get P( z > 1.282) = 0.10

It's always easy to use Standard normal distribution to solve questions of normal distribution because standard normal is special case of normal distribution with mean 0 and standard deviation 1.

To convert x (which follows Normal distribution) to standard normal use: \frac{x-\mu}{\sigma} \sim N(0,1)

so, z = 1.282 = \frac{x-\mu}{\sigma}

<em>hence,</em>

<em> </em>x = 1.282 * \sigma + \mu \\x = 1.282 * 10+_80 \\x = 92.82 \\

Hence Lowest score earned to be qualified for an interview is 92.82

To learn more about Normal Distribution visit:

brainly.com/question/4079902

#SPJ4

5 0
2 years ago
Find and simplify an expression for the area of two rows of b squares with side lengths of b centimeters. Please help!
Ronch [10]

Answer:

The complete area of the given figure is (2 b^3) cm^2

Step-by-step explanation:

Total number of rows = 2

Squares in each row = b

So, the total number of  squares in 2 rows = 2 x ( Squares in 1 row ) = 2 x  b

Also, side length of 1 square = b cm

As we know, AREA OF SQUARE  = SIDE x SIDE

So here, area of 1 square  = Side x side  = b cm  x b cm = (b^2) cm^2

⇒ The area of total (2b) squares  = 2 b x ( Area of  1 square)

= 2 b \times (b^2)  = 2 b^3

Hence, the complete area of the given figure is (2 b^3) cm^2

6 0
3 years ago
Francis earned the following scores on his math quizzes: 86, 84, 90. Jillian earned the following scores on her math quizzes: 84
vitfil [10]

Answer:

3

(

2

+

5

)

=

−

7

(

2

−

1

0

)

+

5

{\color{#c92786}{3(2x+5)}}=-7(2x-10)+5

3(2x+5)=−7(2x−10)+5

6

+

1

5

=

−

7

(

2

−

1

0

)

+

5

Step-by-step explanation:

7 0
3 years ago
I JUST WOKE UP WITH THIS AM I OK!!!????
dimaraw [331]

Answer:

no

Step-by-step explanation:

you will die in 7 days

3 0
3 years ago
Read 2 more answers
HELP PLEASE!
arsen [322]

Answer:a two-step equation is an algebraic equation you can solve in two steps. ... It's always a good idea to check our solution in the original equation to make sure you  didn't make any mistakes:

Step-by-step explanation:

7 0
3 years ago
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