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3 years ago

Need Help With This:

Mathematics

2 answers:

aliya0001 [1]3 years ago

8 0

Answer:

161.00

Step-by-step explanation:

Pavlova-9 [17]3 years ago

5 0

Answer:

230 * (30/100) = 23 * 3 = 69

Step-by-step explanation:

This one can be learned by heart: "what is 30% of 230" means "calculate 30/100 times 230".

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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 fist equation.

"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 second equation.

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

3 years ago

Solve for w in the proportion.

Svet_ta [14]

Answer:

w=40

Step-by-step explanation:

5 0

2 years ago

What is the period of the function below?

sweet-ann [11.9K]

Answer:

Step-by-step explanation:

looking at highest peaks

10 - 6 = 4

6 - 2 = 4

3 0

2 years ago

Solve the equation. Simplify your answer. 3(x - 2) = 6(5 + x) x = [?]

sammy [17]

Answer:

-12 =x

Step-by-step explanation:

3(x - 2) = 6(5 + x)

Distribute

3x -6 = 30 +6x

Subtract 3x from each side

3x-6-3x = 30 +6x-3x

-6 = 30+3x

Subtract 30 from each side

-6 -30 = 30+3x-30

-36 = 3x

Divide each side by 3

-36/3 = 3x/3

-12 =x

8 0

2 years ago

The Smiths spend 6% of their budget on entertainment. Their total budget this year is $3,000 more than last year, and this year

Troyanec [42]

Answer: Their total budget last year was $40,000.

Step-by-step explanation:

Given : The Smiths spend 6% of their budget on entertainment.

i.e. , The money they spend on entertainment = 0.06 x ( Total budget)

{ 6% is converted to 0.06 , when we divide it by 100 to remove percentage)

Since , this year they plan to spend $2,580 on entertainment.

i.e. 0.06 x ( Total budget ) = $2,580

On dividing both sides by 0.06 , we get

( Total budget ) = $2,580 ÷ 0.06

= $43,000

Thus , their total budget for this year = $43,000

Also, Their total budget this year is $3,000 more than last year.

Therefore , their last year total budget = ( Total budget this year ) - $3000

= $43,000 - $3000

= $40,000

Hence, their total budget last year was $40,000.

5 0

3 years ago

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