please help me plsssssss​

Answer:

70%

Step-by-step explanation:

divide 21 by 30 to get .70 multiply by 100 to make percent

70% (or just move decimal two places to the right)

Answer:

70%

Step-by-step explanation:

100 ÷ 30 = 3.3333333333333

21 x 3.3333333333333/30 x 3.3333333333333 = 70/100

21/30 = 0.7

0.7 x 100 = 70%

Answer:

3/5

Step-by-step explanation:

The slope would be 3/5.

We can get the equation down to y=mx+b form first.

3x - 5y = 7

(Subtract 3x from both sides.)

-5y=-3x+7.

(Divide -5 on both sides.)
y=3/5-7/5.

Now, it is not parallel yet since to be parallel it needs a different y intercept, so just make one up.

Like:

y=3/5-7/3.

To see this visibly to make sure we can use desmos. com.

It is a graphing calculator where you can type the equation to see how it is graphed.

Answer:

m=3/5

Step-by-step explanation:

First rewrite the equation in slope intercept form. y=mx+b

[tex]y=\frac{-3}{-5} x-\frac{7}{5}[/tex]

The -3/-5 becomes positive.

[tex]y=\frac{3}{5} x-\frac{7}{5}[/tex]

In order to be parallel, use a different y value for "b."

Therefore, the slope is 3/5. Hope this helps and have a great day.

Answer:

250*(0.96)^8=180 (rounded)

Step-by-step explanation:

The first year, we know there are 250. Moving on every year, we multiply the # from the previous year by 0.96, which is the same as taking 96 percent (excluding the decreasing 4%). This gives us a multiplication of 0.96 ^8, which we have to multiply by the original 250

The answer is C I think.

Answer:

The answer is x+3=4

x+3=4

x=4-3

x = 1

Answer:

I dON"t know how to do this

Step-by-step explanation:

what is scientfic nhotation i will not round my anwer to on decimla place bye bye

Answer:

Step-by-step explanation:

is is (p+3)-2??

Answer:

Quarters = 8

Nickles = 6

Step-by-step explanation:

Call their numbers x and y.

The number equation is

x + y = 14

The value equation is

5x + 25y = 230

5x + 25y = 230-(5x + 5y = 70)

20y = 160

y = 8

x= 6

Answer:

144/5

Step-by-step explanation:

[tex]\large \rm \: 9 \frac{2}{3} \times 1 \frac{1}{29} \times \frac{6}{15 } \times 7 \frac{1}{5} \\ = \frac{29}{3} \times \frac{30}{29} \times \frac{6}{15} \times \frac{36}{5} \\ = 10 \times \frac{216}{75} \\ = \frac{2160}{75} \\ = \frac{144}{5}

[/tex]

Answer:

9⅔ × 1¹/²⁹ × 6/15 × 7⅕ = 29/3 × 30/29 × 6/15 × 36/5 =(29/3 × 30/29) × (6/15 × 36/5) = (29×30 / 3×29) × (6×36 / 15×5) = (30/3) × (72/25) = 30×72 / 3×25 = 144 /5.

Please mark as brainliest answer.

Answer:

≈5.099

Step-by-step explanation:

1) the rule is:

[tex]d=\sqrt{(x_1-x_2)^2+(y_1-y_2)^2};[/tex]

2) according to the rule above, the required distance is:

[tex]d=\sqrt{(-2-3)^2+(-2+3)^2}=\sqrt{26}[/tex]

d≈5.099

Answer:

The answer is D

Step-by-step explanation:

Why

The board is originally 108 inches long when you cut it in half that makes it two different pieces

You would divide 108 by 2 and you get D

Hoped this helped

a) The solution of this ordinary differential equation is [tex]y =\sqrt[3]{-\frac{2}{\frac{3\cdot t}{8}-\frac{\sin 2t}{4}+\frac{\sin 4t}{32}-2 } }[/tex].

b) The integrating factor for the ordinary differential equation is [tex]-\frac{1}{x}[/tex].

The particular solution of the ordinary differential equation is [tex]y = \frac{x^{3}}{2}+x^{2}-\frac{5}{2}[/tex].

a) In this case we need to separate each variable ([tex]y, t[/tex]) in each side of the identity:

[tex]6\cdot \frac{dy}{dt} = y^{4}\cdot \sin^{4} t[/tex] (1)

[tex]6\int {\frac{dy}{y^{4}} } = \int {\sin^{4}t} \, dt + C[/tex]

Where [tex]C[/tex] is the integration constant.

By table of integrals we find the solution for each integral:

[tex]-\frac{2}{y^{3}} = \frac{3\cdot t}{8}-\frac{\sin 2t}{4}+\frac{\sin 4t}{32} + C[/tex]

If we know that [tex]x = 0[/tex] and [tex]y = 1[/tex], then the integration constant is [tex]C = -2[/tex].

The solution of this ordinary differential equation is [tex]y =\sqrt[3]{-\frac{2}{\frac{3\cdot t}{8}-\frac{\sin 2t}{4}+\frac{\sin 4t}{32}-2 } }[/tex]. [tex]\blacksquare[/tex]

b) In this case we need to solve a first order ordinary differential equation of the following form:

[tex]\frac{dy}{dx} + p(x) \cdot y = q(x)[/tex] (2)

Where:

Hence, the ordinary differential equation is equivalent to this form:

[tex]\frac{dy}{dx} -\frac{1}{x}\cdot y = x^{2}+\frac{1}{x}[/tex] (3)

The integrating factor for the ordinary differential equation is [tex]-\frac{1}{x}[/tex]. [tex]\blacksquare[/tex]

The solution for (2) is presented below:

[tex]y = e^{-\int {p(x)} \, dx }\cdot \int {e^{\int {p(x)} \, dx }}\cdot q(x) \, dx + C[/tex] (4)

Where [tex]C[/tex] is the integration constant.

If we know that [tex]p(x) = -\frac{1}{x}[/tex] and [tex]q(x) = x^{2} + \frac{1}{x}[/tex], then the solution of the ordinary differential equation is:

[tex]y = x \int {x^{-1}\cdot \left(x^{2}+\frac{1}{x} \right)} \, dx + C[/tex]

[tex]y = x\int {x} \, dx + x\int\, dx + C[/tex]

[tex]y = \frac{x^{3}}{2}+x^{2}+C[/tex]

If we know that [tex]x = 1[/tex] and [tex]y = -1[/tex], then the particular solution is:

[tex]y = \frac{x^{3}}{2}+x^{2}-\frac{5}{2}[/tex]

The particular solution of the ordinary differential equation is [tex]y = \frac{x^{3}}{2}+x^{2}-\frac{5}{2}[/tex]. [tex]\blacksquare[/tex]

To learn more on ordinary differential equations, we kindly invite to check this verified question: https://brainly.com/question/25731911

Answer:

(0,1)

Step-by-step explanation:

Answer:

1:10 is the time he'll finish

Answer:

Step-by-step explanation:

x^2 + 11

Answer:

  (x, y) = (2, 2)

Step-by-step explanation:

The graph is attached.

Both equations are in slope-intercept form:

  y = mx +b . . . . . . line with slope m and y-intercept b

The graph of the first equation intersects the y-axis at +3, and has a slope (rise/run) of -1/2. That is, it decreases 1 unit for each 2 units to the right.

The graph of the second equation intersects the y-axis at -4, and has a slope of +3. It will increase 3 units for each unit to the right.

The point of intersection of the graphed lines is (2, 2).

The solution is (x, y) = (2, 2).

Answer:

Step-by-step explanation:

As per question, 4 out of 50 do not have interstates.

Find the percent value:

Answer:  a)9 3/4 hours

B)1 11/12 hour

Step-by-step explanation:

Piano: 3 1/2 hour; 3hours 30min

Soccer: 6 1/4 hour; 6hours and 15 min

Telephone: 4 1/3 hour; 4 hours and 20 min.

Remember that in an hour there is 60 min, and 1/2 of an hour is 30 (min), 1/4  is 15(min) and 1/3 is 20(min).

a) 3hours and 30min + 6hours and 15 min

That gives us 9 hours and 45 min, which is 9 3/4 hours.

B) 6hours and 15 min — 4 hours and 20 min

That gives us 1 hour and 55 min, which is 1 11/12 hours.

I hope this helps you!

Answer:

8 is the length, and 15 is the height.

8+7 =15

8*15 = 120

Answer:

904.75

Step-by-step explanation:

The area of a semicircle: r^2[tex]\pi[/tex]/2

Answer:

x = 850 and y = 345

Step-by-step explanation:

x + y = 1195

x - y = 505

Add the two equations

2x + 0y = 1700

2x = 1700

x = 850

Sub x = 850 into the first equation:

850 + y = 1195

y = 345

Thus, x = 850 and y = 345

Answer:

14m-n

Step-by-step explanation:

Combine Like Terms:

=8m + −4n + 6m + 3n

=(8m+6m) + (−4n+3n)

=14m+−n

Answer:

b = 55°

Step-by-step explanation:

Angles around a point will always add up to 360°

Therefore, we can write an expression where we sum the 3 angles given and equate them to 360°:

(b - 15) + 3b + (2b + 45) = 360

eliminate the brackets and collect like terms:

b + 3b + 2b - 15 + 45 = 360

Combine like terms:

6b + 30 = 360

subtract 30 from both sides:

6b = 330

divide both sides by 6:

6b ÷ 6 = 330 ÷ 6

   ⇒  b = 55

Answer:

-9 + 2y^2 + 7y

Step-by-step explanation:

- 6 - 2y^2 - 3 + 3y - 2y^2 + 4y + 6y^2

just combine
-9 + 2y^2 + 7y

Step-by-step explanation:

All the best!

Answer:

0.43 yards is the answer

Step-by-step explanation:

Answer:

£11.40

Step-by-step explanation:

She spent £1.55 + £1.30 = £2.85.

Now she has 3/4 of the original amount.

That means she spent 1/4 of the original amount.

£2.85 is 1/4 of the original amount.

The original amount is 4 × £2.85.

She started with £11.40.

You can solve it by writing an equation.

She started with x.

x - 2.85 = 3x/4

x/4 = 2.85

x = 11.40

Answer:

make do times tabls pls give me points

Step-by-step explanation: