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4 years ago

Using suitable properties find -1/2 x 4/3 - 3/4 + 1/2 x -3/5 pls answer fast

1 answer:

3 0

Answer:Lcm we will get: 

 2 2 3 4 2 5 

 3 1. 3. 2. 1. 5

 5. 1 1 2. 1 5

 2. 1. 1. 1. 1. 1

LCM=15×4=60

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A taxi driver charges a flat rate of $3.25 plus an additional $0.75 per mile. If Amanda has, at most, $70 for a cab ride, how fa

Anna35 [415]

Answer : Amanda can go 89 miles with the 70 dollars she has

Step - by - step explanation :

First, you have to remove the flat rate from the 70 dollars ( since it's a secure amount )

What is 70 - 3.25 ? 66.75

Second, to find out how many miles she can go - we do 66.35 divided by 0.75 ( because it's 0.75 per mile ).

What is 66.75 divided by 0.75 ? 89

4 0

2 years ago

Can plz help me in this question asap I don't get it

34kurt

Answer:

-19+-25f≤-144

Step-by-step explanation:

The problem says that you descended 19 below sea level. Below makes 19 into a negative. It also says that it descends 25 feet per minute. If it says per you put a variable by that number. It also says descends which means going down so that would be a negative. The problem says Lainey does not want to go over 144 feet(144 is also negative because it is below sea level) so 144 would be greater than or equal to because she does not wan to go over that amount.

Hope this helps!

5 0

3 years ago

I just need some help solving this question, i’m not sure what to do

KonstantinChe [14]

From the double-angle identity,

$cos2x=2*sinx*cosx$

we can rewritte our given equation as:

$4sinxcosx-2cosx=0$

By factoring 2cosx on the left hand side, we have

$2cosx(2sinx-1)=0$

This equation has 2 solutions when

$\begin{gathered} cosx=0\text{ ...\lparen A\rparen} \\ and \\ 2sinx-1=0\text{ ...\lparen B\rparen} \end{gathered}$

From equation (A), we obtain

$x=\frac{\pi}{2}\text{ or }\frac{3\pi}{2}$

and from equation (B), we have

$\begin{gathered} sinx=\frac{1}{2} \\ which\text{ gives} \\ x=\frac{\pi}{6}\text{ or }\frac{5\pi}{6} \end{gathered}$

On the other hand, we can find one more solution from the original equation by substituting x=0, that is,

$\begin{gathered} 2ccos(2\times0)-2cos0=0 \\ which\text{ gives} \\ 2\times1-2\times1=0 \\ so\text{ 0=0} \end{gathered}$

then, x=0 is another solution. In summary, we have obtained the following solutions:

$\begin{gathered} x=0 \\ x=\frac{\pi}{2}\text{or}\frac{3\pi}{2}\text{ and } \\ x=\frac{\pi}{6}\text{or}\frac{5\pi}{6} \end{gathered}$

However, the intersection of the last set is empty. So the unique solution is x=0 as we can corroborate on the following picture:

Therefore, the solution set is: {0}

7 0

1 year ago

*PLSSSSS HELP*

klemol [59]

Answer: 39 untits 2

Step-by-step explanation:

Hi, to answer this question, first we have to calculate the perimeter (sum of sides) of the triangle:

Perimeter: 7+6+9.22 = 22.22 units

Then we have to apply the circumference (C) formula:

C = π x diameter

Since C = perimeter of the triangle:

22.22 = 3.14 d

22.22 /3.14 =d

7.08 = d

Finally, we apply the next formula:

Area of a circle = π (d/2)^2

Replacing:

A = 3.14 (7.08/2)^2 = 39.30 units2 = 39 units 2

4 0

3 years ago

Plz help me I’m stuck and it’s important

Radda [10]

Answer:

2 50ml bottles

Step-by-step explanation:

Reading through the question, we have:

For 80mL

$C_1 = \pounds 55$

For 2 50mL bottles.

The cost is calculated by the original cost + half the original cost.

i.e.

$C_2 = \pounds 45 + \frac{1}{2} * \pounds 45$

$C_2 = \pounds 45 + \pounds 22.5$

$C_2 = \pounds 67.5$

Next, is to calculate the unit price of each.

For 80mL

$C_1 = \pounds 55$

$Unit\ price = 55/80$

$Unit\ price = 0.6875$

For 2 50mL bottles.

$C_2 = \pounds 67.5$

$Unit\ price - 67.5/(2 * 50)$

$Unit\ price = 67.5/100$

$Unit\ price = 0.675$

By comparison, the 2 50mL is the best buy because it has smaller unit price

4 0

3 years ago