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3 years ago

The price of a sweater increased from $15 to $21. What is the percent of change

Mathematics

1 answer:

JulijaS [17]3 years ago

5 0

Making some calculation the change si 25.57%

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The figures are similar. find x. the ratio of the perimeters is 5:7

anastassius [24]

Answer:

x = 16.8

Step-by-step explanation:

The ratio of corresponding sides is equivalent to the ratio of the perimeters.

Then using proportion

$\frac{12}{x}$ = $\frac{5}{7}$ ( cross- multiply )

5x = 84 ( divide both sides by 5 )

x = 16.8

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2 years ago

Please help me, because they ask for so many characters in Brainly lol

Andrej [43]

Answer:

$y=3x+5$

Step-by-step explanation:

Hi there!

Linear equations are typically organized in slope-intercept form: $y=mx+b$ where <em>m</em> is the slope and <em>b</em> is the y-intercept (the value of y when the line crosses the y-axis)

Given that the slope is 3, we can plug this into y=mx+b as <em>m</em>:

$y=3x+b$

Now, to solve for <em>b</em>, simply plug in the given point:

$-7=3(-4)+b\\-7=-12+b\\b=5$

Therefore, the y-intercept is 5. Plug this back into the equation:

$y=3x+5$

I hope this helps!

4 0

2 years ago

Bob and mark talk about their families. Bob says he has 3 kids, the product of their age is 72. He gives another clue: the sum o

Bingel [31]

Possible Ages Sum of The Ages 1 2 36 391 4 18 231 8 9 181 3 24 282 3 12 172 4 9 152 6 6 142 2 18 223 3 8 143 4 6 13

The sum has to be 14. So it can be 2, 6, and 6 or 3, 3, and 8.
But it cannot be 3, 3, and 8 because the youngest cannot be a twin.

So it is 2, 6, and 6.

Hope this helps :)

3 0

3 years ago

If y varies directly as x and y = 36 when x = 4,what is the value of y when x=6?

zepelin [54]

Answer:

Step-by-step explanation:

If the two numbers vary directly, we can use a proportion to find the missing value.

36/4 = y/6

4y = 216

Divide by 4

y = 54

Check

36/4 = 54/6

216 = 216 ✅

8 0

2 years ago

In a class there are two girls for every three boys. The ratio 2 : 3 compares the

alekssr [168]

Answer:

a. I'm not sure if there's more to the question but I can't answer without knowing how many is the whole class

B. 12 boys

4 0

1 year ago