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lorasvet [3.4K]

3 years ago

6

A group of students are standing in rows. There are as many students in a row as there are rows. If there are 64 students in the

group, how many students are standing in each row?
А. 4
B. 6
C. 8
D. 12

1 answer:

Vesnalui [34]3 years ago

4 0

Answer:

c 8

Step-by-step explanation:

a^2 = 64 a=8

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What is meant if we say “this equation is an identity”?

scoray [572]

Identity

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The above equation is true for all possible values of x and y, so it is called an identity.

Strictly speaking we should use the "three bar" sign to show it is an identity as shown below. But it is very common to use the equal sign.

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4 years ago

A question paper contains 10 questions, 5 marks are awarded for every correct answer and (-2) marks for every incorrect answer a

Mila [183]

Answer:

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3 0

3 years ago

Anyone here able to lend a helping hand?

elena55 [62]

Answer:

Step-by-step explanation:

1). Vertical intercept of the graph = Point at which the graph intersects the y-axis.

Therefore, vertical intercept is y = 1000.

In this situation vertical intercept means the initial dose of the drug taken = 1000 mg.

2). From the graph attached, point (x, y) represents,

x = Time 't' or duration

y = concentration of the drug after time 't'

Point (0, 1000) represents concentration = 1000 mg of the drug after t = 0 hour

Similarly, (1, 750) represents concentration = 750 mg after t = 1 hour

Therefore, fraction of drug remained = $\frac{750}{1000}$

= $\frac{3}{4}$

3). Let the equation, representing the concentration of the drug and time is,

$y=a(b)^t$

Here, a = Initial amount of the drug (at t = 0 hours)

= 1000 mg

At (t = 1 hours), concentration of the drug = 750 mg

$y=1000(b)^t$

$750=1000(b)^1$

$b=\frac{750}{1000}$

$b=\frac{3}{4}$

Therefore, equation will be,

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8 0

3 years ago

Factor the expression completely.

sashaice [31]

It would be A because -2.25*3=-6.75 and -2.25*x=-2.25x giving us are end answer of, -6.75+2.25x

Enjoy!=)

(P.s. I am not 100% sure if this is completely factored but it should be)

6 0

4 years ago

Read 2 more answers

Complete the equation of the line whose y-intercept is (0,-1) and slope is 4

balandron [24]

Answer:

y=4x-1

Step-by-step explanation:

the lines can be written in their slope intercept form which is y=mx+b

m= slope=4

b=the intercept point=-1

so we have:

y=4x-1

7 0

3 years ago