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2 years ago

8

In a survey, 36% of the students said that they kept an electronic diary. There were 900 students who kept an electronic diary.

How many students were in the survey?

1 answer:

Rasek [7]2 years ago

4 0

The answer is 25000.

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Please help me solve this #algebra #algebra1

Vesna [10]

Answer:

h = 430

Step-by-step explanation:

1290 = h/10 + h/5 Make h/5 into something that is something / 10

1290 = h/10 + 2h/(5*2) Clean up the brackets.

1290 = h/10 + 2h/10 Add the right.

1290 = 3h/10 Multiply both sides by 10

1290*10 = 10(3h/10)

12900 = 3h Divide both sides by 3

h = 430

3 0

3 years ago

What is true about the equation t=c+40

user100 [1]

C=t-40 T-c=40 C-t=-40

6 0

3 years ago

Q8 Q3.) Solve the system by the substitution method.

inn [45]

Recall that $(x+y)^2=x^2+2xy+y^2$ . So we can add twice the first equation to the second one to get

$x^2+y^2+2xy=10+2\cdot3\iff(x+y)^2=16\implies x+y=\pm4$

Since $xy=3$ , we have $y=\dfrac3x$ $(x\neq0)$ so

$x+y=x+\dfrac3x=\pm4\implies x^2\mp4x+3=0$

If $x+y=4$ , then

$x^2-4x+3=(x-3)(x-1)=0\implies x=3,x=1\implies y=1,y=3$

If $x+y=-4$ , then

$x^2+4x+3=(x+1)(x+3)=0\implies x=-1,x=-3\implies y=-3,y=-1$

So the solution set is

$(x,y)\in\{(-3,1),(1,3),(-1,-3),(-3,-1)\}$

3 0

3 years ago

This is geometry pls help will mark brainliest!!

adoni [48]

The Correct Answer Should Be - 70

I Hope This Helps You!!! :)

8 0

2 years ago

Read 2 more answers

When c=_6 and x=2 x-8c

DiKsa [7]

Answer:-46

Step-by-step explanation:

2-8(6)

=-46

5 0

3 years ago