All categories

2 years ago

Last month you spent $30.this month you spent 140% of what you spent last month.how much did you spend?

Mathematics

2 answers:

scoray [572]2 years ago

8 0

42 I think. I'm sorry if I'm wrong.. Hope this helped!!

Katen [24]2 years ago

7 0

Answer:

You spent $42 this month

Step-by-step explanation:

As <em>you spent $30</em> las month, <em>and this month you spent 140% of $30</em>, in order to know how much you spent this month you should make the following calculation

$30*1.4=42$

Therefore, $42 is the correct answer.

You might be interested in

Help needed! (will mark as brainliest)

Aloiza [94]

Answer:

it is the 3rd option

Step-by-step explanation:

4 0

2 years ago

Read 2 more answers

The difference between the two roots of the equation 3x^2+10x+c=0 is 4 2/3 . Find the solutions for the equation.

andrezito [222]

Answer:

Given the equation: $3x^2+10x+c =0$

A quadratic equation is in the form: $ax^2+bx+c = 0$ where a, b ,c are the coefficient and a≠0 then the solution is given by :

$x_{1,2} = \frac{-b\pm \sqrt{b^2-4ac}}{2a}$ ......[1]

On comparing with given equation we get;

a =3 , b = 10

then, substitute these in equation [1] to solve for c;

$x_{1,2} = \frac{-10\pm \sqrt{10^2-4\cdot 3 \cdot c}}{2 \cdot 3}$

Simplify:

$x_{1,2} = \frac{-10\pm \sqrt{100- 12c}}{6}$

Also, it is given that the difference of two roots of the given equation is $4\frac{2}{3} = \frac{14}{3}$

i.e,

$x_1 -x_2 = \frac{14}{3}$

Here,

$x_1 = \frac{-10 + \sqrt{100- 12c}}{6}$ , ......[2]

$x_2= \frac{-10 - \sqrt{100- 12c}}{6}$ .....[3]

then;

$\frac{-10 + \sqrt{100- 12c}}{6} - (\frac{-10 + \sqrt{100- 12c}}{6}) = \frac{14}{3}$

simplify:

$\frac{2 \sqrt{100- 12c} }{6} = \frac{14}{3}$

$\sqrt{100- 12c} = 14$

Squaring both sides we get;

$100-12c = 196$

Subtract 100 from both sides, we get

$100-12c -100= 196-100$

Simplify:

-12c = -96

Divide both sides by -12 we get;

c = 8

Substitute the value of c in equation [2] and [3]; to solve $x_1 , x_2$

$x_1 = \frac{-10 + \sqrt{100- 12\cdot 8}}{6}$

$x_1 = \frac{-10 + \sqrt{100- 96}}{6}$ or

$x_1 = \frac{-10 + \sqrt{4}}{6}$

Simplify:

$x_1 = \frac{-4}{3}$

Now, to solve for $x_2$ ;

$x_2 = \frac{-10 - \sqrt{100- 12\cdot 8}}{6}$

$x_2 = \frac{-10 - \sqrt{100- 96}}{6}$ or

$x_2 = \frac{-10 - \sqrt{4}}{6}$

Simplify:

$x_2 = -2$

therefore, the solution for the given equation is: $-\frac{4}{3}$ and -2.

3 0

2 years ago

Which expression is a factor of both (x - 2)^2 and -3x + 6

Natalija [7]

Answer:

-x+2or-1x+2

hope it's helpful ❤❤❤❤❤❤

THANK YOU.

6 0

2 years ago

A crew will arrive in one week and begin filming a city for a movie. The mayor is desperate to clean the city streets before fil

Zigmanuir [339]

Answer:

See below in bold.

Step-by-step explanation:

You work in fractions of the city streets done per hour:

1/200 + 1/400 = 1 /x where x is the number of hours taken by 2 teams.

Multiply through by the LCM 400x:

2x + x = 400

3x = 400

x = 133.33 hours.

As there are 168 hours in a week they will have enough time.

6 0

3 years ago

What is 54 percent as a fraction in simplest form

atroni [7]

54% is 54 out of 100.
There for the numerator is 54 and the denominator is 100.

$\frac{54}{100}$

Now, both the top and the bottom can be divided by 2. So:

$\frac{54~divided~by~2}{100~divided~by~2}$ = $\frac{27}{50}$

$\frac{27}{50}$ can't be simplified anymore, therefore, 27/50 is 54% as a fraction.

~Hope this helped :)

6 0

2 years ago

Read 2 more answers