All categories

3 years ago

PLS ANSWER QUICK I WILL GIVE BRAINLIEST

Mathematics

1 answer:

NISA [10]3 years ago

8 0

Answer:

Step-by-step explanation:

First, we are decreasing the number so it has to be a decrease.

Next, we divide 7/31 and get around 0.23, which also represents 23 percent.

This only shows that 7 is 23 percent of 31, so we need to find the decrease by seeing the difference of 100 and 23.

We get 100 - 23 = 77, and because it is a decrease we get B.

You might be interested in

Please help? 20 points!!!!!!!!!!!!!!!!!!

Vinvika [58]

Answer:

Year 12

They will be 62 inches

Brainliest plz took me so loong

Step-by-step explanation:

Year 1: Eva 40, Naomi 29

Year 2: Eva 42, Naomi 32

Year 3: Eva 44, Naomi 35

Year 4: Eva 46, Naomi 38

Year 5: Eva 48, Naomi 41

Year 6: Eva 50, Naomi 44

Year 7: Eva 52, Naomi 47

Year 8: Eva 54, Naomi 50

Year 9: Eva 56, Naomi 53

Year 10: Eva 58, Naomi 56

Year 11: Eva 60, Naomi 59

Year 12: Eva 62, Naomi 62

Equation:

12 years so

Eva's equation: 12x2=24 24+38=62

Naomi's equation:12x3=36 36+26=62

4 0

4 years ago

Lowest term fractio 15/20

Veronika [31]

Answer:

that could be 1/3

Step-by-step explanation:

i simplified the answer

4 0

3 years ago

Read 2 more answers

Please help! I'll give a lot of points!!!

harina [27]

Answer:

41 i think i hope this is right

Step-by-step explanation:

4 0

3 years ago

Factorise the expressions and divide them as directed.

Annette [7]

a) 3(x-9)= 3x -9

3x-27=3x -9

3x-3x=-9+27

x=18

b) 2x+3x=5x^2

2x+3x=( 5x)^2

2x+3x=25x

5x=25x

x=25x/5

x=5x

6 0

3 years ago

Need help with math homework

Pavel [41]

Hello!

The answer for A is:

$X1=-1\\X2=5$

The answer for B is: The rocket will hit the lake surface in 5 seconds.

Defining the terms:

$a=-16\\b=64\\c=80\\$

So, replacing it in the quadratic equation (it's given to you in the exercise)\\

$x=\frac{-b+-\sqrt{b^{2}-4*a*c } }{2*a}$

$x=\frac{-64+-\sqrt{64^{2}-4*-16*80 } }{2*-16}$

$x=\frac{-64+-\sqrt{64^{2}+5120} }{-32}=\frac{-64+-\sqrt{4096+5120} }{-32}\\x=\frac{-64+-\sqrt{9216} }{-32}=\frac{-64+-\ 96 }{-32}\\x=\frac{-64+-\ 96 }{-32}\\x1=\frac{-64+\ 96 }{-32}=\frac{32}{-32} =-1\\\\x1=\frac{-64-\ 96 }{-32}=\frac{-160}{-32} =5\\$

We are working with a quadratic equation, so we will have two possible results,

$X1=-1\\X2=5\\$

Now, we are asked to find the time, time can not be a negative value, we have to discard X1 (-1) since it's a negative value, knowing that, the rocket will hit the lake after 5 seconds.

Have a nice day!

5 0

4 years ago