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3 years ago

Help please I really need it

Mathematics

1 answer:

KatRina [158]3 years ago

8 0

First write the equation 8 + 12 > x because according to the triangle property, the sum of any 2 sides have to be greater than the third side. This means that the difference of any two sides should be smaller than the third side.

So, the answer would be 4 < x < 20.

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wolverine [178]

Answer:

Ivy is 6 years old and Rose is 12 years old.

Step-by-step explanation:

To solve this problem, two variables are necessary since we have two unknown variables: Ivy's age and Rose's age.

Ivy's age will be $x$

and Rose's age will be $y$

"Ivy is half as old as her sister":

$x=\frac{y}{2}$

this will be our <u>fist equation.</u>

"In six years, Ivy will be two-thirds as old as Rose"

in six years Ivy will have $x+6$ years, and Rose will have $y +6$ years, so for this sentence we have the equation:

$x+6=\frac{2}{3}(y+6)$

this will be our <u>second equation.</u>

Substituting the value of x from the first equation into the second, and solving for y(Rose):

$\frac{y}{2}+6=\frac{2}{3} (y+6)\\\frac{y+12}{2} =\frac{2}{3} (y+6)\\y+12=\frac{4}{3} (y+6)\\3(y+12)=4(y+6)\\3y+36=4y+24\\36-24=4y-3y\\12=y$

Rose is 12 years old.

and Ivy (using the fist equation):

$x=\frac{12}{2}=6$

Ivy is 6 years old.

6 0

4 years ago

Why does the fact family for 81 and 9 only have two number sentences?

sukhopar [10]

Because, 9 x 9 = 81. Hope I helped!

6 0

4 years ago

Suppose you hear a weather forecaster say a front is forming over your area. However, you don’t hear what kind of front it is. W

Savatey [412]

Answer:

The conclusion that you can raw about the coming weather is : you could assume the weather will be stormy and unsettled, since all kind of fronts uusally bring some form of precipitation.

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

What is the answer of. 4y+7>-x-3

lora16 [44]

I don’t know what u need to look for but I think for y
4y+7>-x-3
4y>-x-10
y>-1/4x-5/2

5 0

3 years ago

Pls help what do I put

aleksandr82 [10.1K]

Answer:

m+m×0.15

because it increased by 15%

you get m's 15% if you multiply it with 0.15

7 0

3 years ago