All categories

2 years ago

Please help me and ill mark you brainlest

Mathematics

2 answers:

dedylja [7]2 years ago

8 0

Answer:

Step-by-step explanation:

Multiply by 3

4 x 3 = 12

9 x 3 = 27

Archy [21]2 years ago

5 0

Answer:

Step-by-step explanation:

We can find the answer by comparing the sides of the triangles!

We are trying to find a triangle where the ratios are the same: 4/9 has to equal another fraction.

Triangle D is correct because 12/27=0.4 which is equal to 4/9=0.4

another way we can check is by seeing how much 4 is multiplied to get to twelve and seeing how much 9 is multiplied to get to 27

4*3=9

9*3=27

by this we can confirm the fractions of 4/9 and 12/27 are equal because both 4 and 9 are multiplied by the same number to get to the new fraction numbers.

hope this helps!

You might be interested in

How must m2 be changed to keep the lines parallel?

Anna [14]

Answer:

bring the lines side by side ( example || )

Step-by-step explanation:

3 0

3 years ago

Please help me! Don't understand.

FromTheMoon [43]

The new area would be 270

7 0

2 years ago

Subject: Mathematics

lina2011 [118]

$\\ \sf\longmapsto \dfrac{1}{x-1}>4$

Multiply x-1 on both sides

$\\ \sf\longmapsto \dfrac{1}{x-1}\times (x-1)> 4(x-1)$

$\\ \sf\longmapsto 1>4(x-1)$

$\\ \sf\longmapsto 1> 4x-4$

Add 4 on both sides

$\\ \sf\longmapsto 1+4> 4x$

$\\ \sf\longmapsto 5> 4x$

Divide both sides by 4

$\\ \sf\longmapsto \dfrac{5}{4}>x$

$\\ \sf\longmapsto x< \dfrac{5}{4}$

Now

ATQ to the equation $\bf \dfrac{1}{x-1}$ x should be greater than 1 .Because if it becomes 1 then the denominator will be 0 which is impossible.

Hence x>1

Thus

$\\ \sf{:}\!\implies 1$

Now

$\\ \therefore\boxed{\bf x\epsilon \left(1,\dfrac{5}{4}\right)}$

6 0

2 years ago

Read 2 more answers

Solve (-8) to the second power

labwork [276]

Answer:

Step-by-step explanation:

8 times 8 is 64, but it is the opposite of positive is negative

3 0

2 years ago

Read 2 more answers

Suppose that 12 people enter an elevator on the 1st floor of a 24 floor building. Assume that all 12 independently pick a floor

olga2289 [7]

Answer:

∑E(x $_{i}$ ) = 13.49167 floors

Step-by-step explanation:

The expected number of floors no one get off = ∑E(x $_{i}$ ) where i is from 0 to 23

and E(x $_{i}$ ) = ∑x $_{i}$ P(x $_{i}$ )

here x $_{i}$ is the indicator of floor where no one gets off, its value is 0 when atleast one person get off on its floor and 1 when when no one gets off.

Now,

P(x $_{i}$ =1) = (22/23)¹²

P(x $_{i}$ =0) = [1-(22/23)¹²]

Now,

E(x $_{i}$ ) = ∑x $_{i}$ P(x $_{i}$ ) = 0* [1-(22/23)¹²] + 1*(22/23)¹² =0.586594704

For total number of floors where no one gets off

∑E(x $_{i}$ ) = E(x₁)+E(x₂)+E(x₃)........................+E(x₂₃)

∑E(x $_{i}$ ) = 23*0.586594704

∑E(x $_{i}$ ) = 13.49167 floors

6 0

2 years ago