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Vesna [10]
3 years ago
11

Find the number, if 0.7 of it is 42.

Mathematics
2 answers:
madreJ [45]3 years ago
6 0

Answer:

x=60

Step-by-step explanation:

In this case, we need to find 0.7 of any number is 42. Let the number is x.  According to given question,

0.7\times x=42

Dividing the above equation by 0.7. We can find the value of x as :

\dfrac{0.7x}{0.7}=\dfrac{42}{0.7}

x=60

So, if 0.7 of any number is 42, so the number is 60. Hence, this is the required solution.

gizmo_the_mogwai [7]3 years ago
3 0

Answer:

60

Step-by-step explanation:

0.7x=42

42/0.7=60

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Select all the correct expressions in the table which expressions are equivalent to the given complex number 45+2i
aksik [14]

Answer:

its gonna be the second one down on the left!! i can give an explanation if ur having trouble

Step-by-step explanation:

6 0
3 years ago
​Joe's annual income has been increasing each year by the same dollar amount. The first year his income was ​$17 comma 90017,900
Vedmedyk [2.9K]

Answer:

In 17th year, his income was $30,700.

Step-by-step explanation:

It is given that the income has been increasing each year by the same dollar amount. It means it is linear function.

Income in first year = $17,900

Income in 4th year = $20,300

Let y be the income at x year.

It means the line passes through the point (1,17900) and (4,20300).

If a line passes through two points (x_1,y_1) and (x_2,y_2), then the equation of line is

y-y_1=\frac{y_2-y_1}{x_2-x_1}(x-x_1)

The equation of line is

y-17900=\frac{20300-17900}{4-1}(x-1)

y-17900=\frac{2400}{3}(x-1)

y-17900=800(x-1)

y-17900=800x-800

Add 17900 on both sides.

y=800x-800+17900

y=800x+17100

The income equation is y=800x+17100.

Substitute y=30,700 in the above equation.

30700=800x+17100

Subtract 17100 from both sides.

30700-17100=800x

13600=800x

Divide both sides by 800.

\frac{13600}{800}=x

17=x

Therefore, in 17th year his income was $30,700.

5 0
3 years ago
PLEASE HELP QUICKLY!!! A student's parents offer him one of two options to receive scholarship money for college.
emmainna [20.7K]

Answer:

A = $47,500.00, B = $65,536.00; B, because he receives $18,036.00 more

Step-by-step explanation:

Option A Versus Option B

Option A                                                Option B

Day Amount Deposited                        Day Amount Deposited

0     $40,000.00                                    0       $1.00

1      $40,250.00                                     1        $2.00

2      $40,500.00                                    2       $4.00

...

30   $47,500                                          16      $65,536.00

Answer:

A = $47,500.00, B = $65,536.00; B, because he receives $18,036.00 more

7 0
3 years ago
Please answer 5,6,7. With explanation.
Anestetic [448]
First you need to know some rules 2 numbers that are the same with coefficients divided : you differentiate those coeff
and multyplied :you sum up them

12x^8/3x^3= 4x^8-3=4x^5

20^2x=20^x*20^x

m^5*m^-7=m^5-7=m^-2







8 0
3 years ago
Please answer!! I tried doing it myself and it didn’t work. Again pls answer! Rewards are 20 points
Damm [24]

Answer:-45

Step-by-step explanation:this is how I do it: draw a line in the middle of the equal sign. Now its split in two parts. Do the opposite operation on the left side, so minus 6 from the left AND the right. Now it equals to y/3 = -15. Now times each side by 3 so the y stands alone. -15 times 3 equals -45. Y = -45. Sorry it's kinda hard to explain!

4 0
3 years ago
Read 2 more answers
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