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masya89 [10]
3 years ago
11

If 3/5 of a number is 42,what is the twice number

Mathematics
2 answers:
ELEN [110]3 years ago
7 0

Answer:

2x=140

Step-by-step explanation:

Let the number be x

3/5x=42

X=42×5÷3

X=210÷3

X=70

Multiplying both sides by 2, we get:

2x=140

JulsSmile [24]3 years ago
3 0

Answer:

  140

Step-by-step explanation:

Let the number be represented by x. You are given ...

  (3/5)x = 42

Multiplying by 10/3 gives ...

  (10/3)(3/5)x = (10/3)(42)

 2x = 140 . . . . the value of twice the number

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How many times greater was the temperature in Miami (45) than the lowest in San Diego (25)
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Answer:

<em>The temperature in Miami is 9/5 times the temperature in San Diego.</em>

Step-by-step explanation:

<u>Ratios</u>

To compare the temperature in Miami (45) with the temperature in San Diego (25), we use the division or ratio between both numbers:

\displaystyle \frac{45}{25}

Simplify the fraction dividing by 5:

\displaystyle \frac{9}{5}

Since the relation between them is 9/5, it means the temperature in Miami is 9/5 times the temperature in San Diego.

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3 years ago
Write an equation for a line parallel to y=3x-3 and passing through the point (4,15)
Andrews [41]

Hello!

To find the equation of a line parallel to y = 3x - 3 and passing through the point (4, 15), we need to know that if two lines are parallel, then their slopes are equivalent.

This means that we create a new equation in slope-intercept form, which includes the original slope, which is equal to 3.

In slope-intercept form, we need a y-intercept. So, we would substitute the given ordered pair into the new equation with the same slope and solve.

Remember that slope-intercept form is: y = mx + b, where m is the slope and b is the y-intercept.

y = 3x + b (substitute the ordered pair (4, 15))

15 = 3(4) + b (simplify)

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Therefore, the equation for the line parallel to the line y = 3x - 3, and passing through the point (4, 15) is y = 3x + 3.

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3 years ago
A knife is three times the cost of a spoon. 9 spoons and 12 knifes cost ?82.80 workout the cost of 1 knife.
tankabanditka [31]

Let S = spoon

Let K = knife


1 knife is thee times the cost of a spoon, so it would be 3S

Now you have 9S + 12K = 82.80

We can replace the K with 3S:

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Simplify the left side:

9S + 36S = 82.80

Add:

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7 0
3 years ago
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The given figure is a parallelogram find the value of x and y
e-lub [12.9K]

Answer:

Step-by-step explanation:

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5 0
3 years ago
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