3 years ago

How do I do these problems?

Mathematics

1 answer:

Ilya [14]3 years ago

8 0

I have no clue I am in 7th grade I am sorry I have no idea what this is? :(

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How do I decease 7 by 3%

FromTheMoon [43]

Answer:

6.79

Step-by-step explanation:

First of all, you will have to know how much is 3% of 7 in order to decrease it by that amount.

7 x 0.03 = 0.21

Now that you know the amount, you can subtract it from seven and therefore you have decreased 7 by 3%.

7 - 0.21 = 6.79

3 0

2 years ago

Read 2 more answers

Me Digão qual e a resposta

WINSTONCH [101]

Answer:

As somas estão abaixo

Step-by-step explanation:

a) 158

b) 2095

c) 2819

d) 9082

Eu espero que isso ajude :)

3 0

3 years ago

Given the sequence 1,3,5,7, find the next terms

bekas [8.4K]

9,11,13,15,17,19,21,23

3 0

3 years ago

If xy + x = 12 and dx/dt = -3, then what is dy/dt when x = 2 and y = 5?

dlinn [17]

If $xy + x = 12$ , then
$\dfrac{d}{dt}(xy+x)= \dfrac{d}{dt}(12)$ .
Use the chain rule:
$y\dfrac{dx}{dt}+x \dfrac{dy}{dt}+ \dfrac{dx}{dt}=0$ ,
Since x=2, y=5, <span>dx/dt = -3, then
</span>
$5\cdot (-3)+2\cdot \dfrac{dy}{dt}+(-3)=0, \\ 2\cdot \dfrac{dy}{dt}=18, \\ \dfrac{dy}{dt}=9$ .

3 0

3 years ago

Solve for x. Show each step of the solution.<br> 2.5(4-x)+12=21-4(2.5x+7)

erastova [34]

Answer:

x=-58/15

Step-by-step explanation:

distribute first 10-2.5x+12=21-10x-28

Simplify(add the numbers) 22-2.5x=-7-10x

move the variable to the left side 22-2.5x+10x=-7

move the constant to the right side -2.5x+10x=-7-22

simplify like terms 7.5x=-29

divide by 7.5 x=-58/15

alternate forms are x=-3 13/15 or x=-3.86

8 0

2 years ago