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Evgen [1.6K]
3 years ago
5

Multipy the expreshions (2h+2.7) (2h-27)​

Mathematics
1 answer:
Musya8 [376]3 years ago
5 0

Answer:

4h^2-48.6h-72.9

Step-by-step explanation:

(2h+2.7) (2h-27)\\4h^2-54h+5.4h-72.9\\4h^2-48.6h-72.9

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E varies directly with the square root of C. If E=40 when C=25 find: E when C= 49
tiny-mole [99]

Answer: E = 56

Step-by-step explanation:

E is proportional to √C

To remove proportionality, introduce a constant (k).

E = k × √C

From question,

E = 40 and C = 25

So,

40 = k ×√25

40 = k × 5

k = 8

Now,

C = 49

k = 8

E = ?

E = k√C

E = 8 × √49

E = 8 × 7

E = 56

6 0
3 years ago
Read 2 more answers
Plz help me i need the answer to this i dont get it
quester [9]

Answer:

A: (2,-4)  B: (2,-1) C: (5,-1) D: (5,-2)

Reflected over x-axis:

A: (2,4)  B: (2,1) C: (5,1) D: (5,2)

2 units right one unit down

A: (4,-5)

dilated by 3

rotated 180 about the origin-

(-4,5)

Step-by-step explanation:

Your finding the transformations for only A

7 0
2 years ago
Read 2 more answers
I dont understand and this is very urgent so can someone help me out please?
wariber [46]

Answer:

Please Find the solution below

Step-by-step explanation:

Let us say the two equations are

x+y=5            --------------(A)

x-y=1              -------------(B)

Let us solve them for x and y by adding them

2x=6

x=3

Hence from (A)

3+y=5

y=2

Hence our solution is

x=3, y=2

Adding same number to equation (A) say 2 we get

x+y+2=5+2

x+y=5+2-2

x+y=5

Hence equation remains the same while adding same number to each side.

Same thing happens if we add same number to equation (B)

Hence we draw the conclusion that the solution remains the same if same number is added to each side of the original equation.

6 0
3 years ago
Which of the following expressions are equivalent to 6 + (-4) - 5
Mila [183]

Answer:

B and C

Step-by-step explanation:

All you need to do is find the answer for all of them and see which ones match

Original:

6 + (-4) - 5

6 - 4 - 5

2 - 5

<u><em>-3</em></u>

This is the answer for the original expression, now we need to see which one is the correct match....

A. -(-6 + 4 ) - 5

2 negatives being subtracted gives you a positive

6 + 4 - 5

10 - 5

5

Incorrect, so now we know its not A

B. 6 - 4 - ( -5)

Again 2 negatives give you a positive

6 - 4 + (5)

6 - 9

-3

Correct, so now we know its B

C. 6 - (4 + 5)

PEMDAS so do the parenthesis first

6 - 9

-3

Correct, so now we it's C.

D. 6 + 4 - 56

10 - 56

-46

Incorrect, so now we know its not D

E. -(-6) + (-4) - (-5)

Again, 2 negatives equal a positive

6 - 4 + 5

2 + 5

7

Incorrect so now we know its not E

The correct answer is C

Hope this helped!

Have a supercalifragilisticexpialidocious day!

6 0
2 years ago
100 POINTS ANSWER FAST NO BEGINNERS OR AMBITIOUS, VIRTUOSO AND UP ONLY
Flauer [41]
I hope this helps you

8 0
3 years ago
Read 2 more answers
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