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3 years ago

Simplify the number using the imaginary unit I. sqrt-25 a.-5t b.5i c.-5 d.5

Mathematics

2 answers:

Studentka2010 [4]3 years ago

7 0

$\sqrt{-25} = \sqrt{-1\times25} = \sqrt{25} \sqrt{-1} =5i$

pentagon [3]3 years ago

4 0

The answer to this question is: B;5i

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Jose asks his friends to guess the higher of two grades he received on his math tests. He gives them two hints. The difference o

tatyana61 [14]

Answer : 96

x – y = 16 --------> equation 1

1/8 x + 1/2 y = 52

x is the higher grade and y is the lower grade

We solve the first equation for y

x - y = 16

-y = 16 -x ( divide each term by -1)

y = -16 + x

Now substitute y in second equation

1/8 x + 1/2 ( -16 + x ) = 52

1/8x - 8 + 1/2 x = 52

1/8x + 1/2x - 8 = 52

Take common denominator to combine fractions

1/8x + 4/8x -8 = 52

5/8x - 8 = 52

Add 8 on both sides

5/8x = 60

Multiply both sides by 8/5

x = 96

We know x is the higher grade

96 is the higher grade of Jose’s two tests.

8 0

3 years ago

0x-7*9 = 0 Solve for x.

Helga [31]

Answer:

Undefined

Step by step explaination:

by order of operations we know that we multiply first;

so, 0x-(7*9)=0

1) Multiply the ones in brackets first:

0x-63=0

2) To make X the subject perform the opposite operation:

0x-64+63=0+63

0x=63

3) Divide 0 on both sides;

0x/0= 63/0

therefore; x is undefined

3 0

1 year ago

Read 2 more answers

The width of a rectangle is 8 units less than the length. The area of the rectangle is 9 units. What is the length, in units, of

Kipish [7]

W=l-8
a=9
a=lw
9=(l-8)l
9=l²-8l
0=l²-8l-9
factor
0=(l-9)(l+1)
set to zero
l-9=0
l=9
l+1=0
l=-1, false length can't be negative

l=9
the length is 9 units long

8 0

3 years ago

6.4 x 1.2 show your work

zimovet [89]

Answer:

7.68

Step-by-step explanation:

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2 years ago

I need help ASAP Someone please help me questions 7&8

attashe74 [19]

For #7, one line should have the y-intercept of -2 and a slope of 2/3 and the other line's y-intercept is 1 and its slope should be -5.

In the image provided, the red line represents 2/3x - 2 and the blue line represents -5x + 1.

8) Organize the information you are given.

*Savannah is 24 years older than Ryan.

So, Ryan's age + 24 = Savannah's age.

*Sebastian is 5 times as old as Ryan.
So, Ryan's age × 5 = Sebastian's age.

*Savannah and Sebastian are twins. They have the same age.
So, Savannah's age = Sebastian's age

Let x represent Ryan's age.

Write the equation based on the information you are given.

x + 24 = x(5)

x + 24 = 5x

Solution: D) 24 + x = 5x

6 0

3 years ago