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3 years ago

Find 70% of 90. plsss tysm

Mathematics

2 answers:

Allushta [10]3 years ago

4 0

Answer:

The Answer is 63.

Step-by-step explanation:

Have a great day :)

tiny-mole [99]3 years ago

4 0

Answer:

Step-by-step explanation:

.7 x 100 = 70 (because 70% of 100 is 70)

Applying the same logic to 90:

.7 x 90 = 63

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(25 points) Ricardo wants to mix 1 part yellow paint to 3 parts blue paint to make a certain shade

Lapatulllka [165]

Answer:

6 pints of blue

Step-by-step explanation:

note- 8 pints = 1 gallon

Original ratio- 3 parts blue to 1 part yellow ( 3b:1y)

This will make 4 pints if we say that 1 part can be one pint
Ricardo needs 8 pints

Divide the amount needed by how much one portion will make

8/4= 2

Multiply original ratio by 2 to see how many pints of each he’ll need for his new amounts

1y*2= 2 pints yellow paint

3b*2=6 pints of blue paint

So to make 8 pints of green with 3 parts blue to 1 part yellow Ricardo will need 6 pints of blue paint

Let me know if you have any questions and I hope this helps! :)

6 0

2 years ago

How many solutions do the TWO equations have?

Nadya [2.5K]

Answer:

Below.

Step-by-step explanation:

15y + 12x = 18

5y + 4x = 6

The second equations is the first times 3 so they are basically the same.

Infinite Solutions.

2x+ 3y= 12

-6y= 4x-24 Rearranging the second equation:

-4x - 6y = -24 Multiplying the first equation by 2:

4x + 6y = 24

- we see that the last equation is -1 * previous equation.

So there are infinite solutions.

7 0

3 years ago

Factorize : y^3 -2y^2 -29y -42

AVprozaik [17]

Answer: $(y-7)(y+3)(y+2)$

Step-by-step explanation:

$y^{3} -2y^{2}-29y-42\\\\(y^{2}-4y-21)(y+2)\\\\(y-7)(y+3)(y+2)\\\\$

Hope this helps, have a BLESSED AND WONDERFUL DAY! As well as a great Black History Month and Valentine's day! :-)

- Cutiepatutie ☺❀❤

7 0

3 years ago

Find the distance between each pair of point. Round to the nearest hundredth(-8, -2) and (6, -1)

Murljashka [212]

Answer:

the square root of 197

Step-by-step explanation:

delta x=14

delta y=1

therefore with the Pythagorean theorem, the hypotenuse/distance is the square root of 197

7 0

3 years ago

2 points) Sometimes a change of variable can be used to convert a differential equation y′=f(t,y) into a separable equation. One

Stells [14]

$y'=(t+y)^2-1$

Substitute $u=t+y$ , so that $u'=y'$ , and

$u'=u^2-1$

which is separable as

$\dfrac{u'}{u^2-1}=1$

Integrate both sides with respect to $t$ . For the integral on the left, first split into partial fractions:

$\dfrac{u'}2\left(\frac1{u-1}-\frac1{u+1}\right)=1$

$\displaystyle\int\frac{u'}2\left(\frac1{u-1}-\frac1{u+1}\right)\,\mathrm dt=\int\mathrm dt$

$\dfrac12(\ln|u-1|-\ln|u+1|)=t+C$

Solve for $u$ :

$\dfrac12\ln\left|\dfrac{u-1}{u+1}\right|=t+C$

$\ln\left|1-\dfrac2{u+1}\right|=2t+C$

$1-\dfrac2{u+1}=e^{2t+C}=Ce^{2t}$

$\dfrac2{u+1}=1-Ce^{2t}$

$\dfrac{u+1}2=\dfrac1{1-Ce^{2t}}$

$u=\dfrac2{1-Ce^{2t}}-1$

Replace $u$ and solve for $y$ :

$t+y=\dfrac2{1-Ce^{2t}}-1$

$y=\dfrac2{1-Ce^{2t}}-1-t$

Now use the given initial condition to solve for $C$ :

$y(3)=4\implies4=\dfrac2{1-Ce^6}-1-3\implies C=\dfrac3{4e^6}$

so that the particular solution is

$y=\dfrac2{1-\frac34e^{2t-6}}-1-t=\boxed{\dfrac8{4-3e^{2t-6}}-1-t}$

3 0

3 years ago