I need help on my math.

Answer:

30 and 20

Step-by-step explanation:

Answer:

0.35%

Step-by-step explanation:

690

12×36 + 258 = 690 For extending to 20 characters

Answer:

D. on Edg 2020

Step-by-step explanation:

You are welcome, I helped better than that other guy!!!

Answer:

D. [tex]\left \{ {{y=4x^{2} } \atop {y=x^{3}+2x }} \right.[/tex]

Answer:

K=5

Step-by-step explanation:

12k-15=35+2k

12k=50+2k

10k=50

k=5

Answer:

[tex]k = 5[/tex]

Step-by-step explanation:

[tex]12k - 15 = 35 + 2k[/tex]

Our goal is to isolate k

[tex]12k - 15 = 35 + 2k\\\;\;\;\;+15 \;\;\;\;\;\;\; +15[/tex]

[tex]12k = 50 + 2k\\-2k \;\;\;\;\;\;\;\; -2k[/tex]

[tex]10k = 50[/tex]

Now we have k isolated to one side. Our final step is to have k be just k, no coefficient. We can do this by dividing each side by the coefficient.

[tex]\large\frac{10k}{10} = \frac{50}{10} \\\\10k\;\div\;10 = k\\50\;\div\;10 = 5\\[/tex]

[tex]\large\boxed {k \;=\;5}[/tex]

~[tex]InLoveWithPugs[/tex]

[tex]Moderator\\Math\ Enthusiast[/tex]

follow me please .........

Answer:

............................

Step-by-step explanation:

.,.,.,.,.,.,.,.,.,,,,,.,.,.،.،.،.،.،.

Answer:

(3, 2)

General Formulas and Concepts:

Pre-Algebra

Algebra I

Step-by-step explanation:

Step 1: Define systems

-3x + 10y = 11

-8x + 2y = -20

Step 2: Rewrite systems

-8x + 2y = -20

Step 3: Redefine systems

-3x + 10y = 11

y = 4x - 10

Step 4: Solve for x

Substitution

Step 5: Solve for y

Step 6: Graph system

Check the system.

Answer:

The average speed on level road is 65 mph

Step-by-step explanation:

Let the speed on the winding road be x mph

So the speed on the straight road will be x +20 mph

Mathematically, distance = speed * time

Distance on level road will be;

(x + 20)2

Distance on winding road will be;

x* 4 = 4x

Thus, we have;

2(x + 20) + 4x = 310

2x + 40 + 4x = 310

6x + 40 = 310

6x = 310 - 40

6x = 270

x = 270/6

x = 45 mph

The average speed on the level road is x + 20

That will be 45 + 20 = 65 mph

Answer: x = 16

Step-by-step explanation: The y values keep going up by multiplying 2. 2x2=4, 4x2=8, so 8x2=16.

To plot the points just put the point coordinated with the x values and y values.

Answer:option D for the first one

Step-by-step explanation:

It adds up to what they bought

Answer:

42x+−17

Step-by-step explanation:

(7)(6x)+(7)(−4)+11

42x+ −28 + 11

(42x)+(−28+11)

42x+−17

Answer:

Step-by-step explanation:

The formula for calculating the confidence interval is expressed as;

CI = xbar ± z*s/√n

xbar is the sample mean =  $73,220

z is the z score at 99% CI = 2.576

s is the standard deviation = $4400

n is the sample size = 400

Substitute the given values into the formula;

CI = 73,220 ± 2.576*4400/√400

CI = 73,220 ± 2.576*4400/20

CI = 73,220± (2.576*220)

CI = 73220±566.72

Hence a 99% confidence interval for μ is 73220±566.72

Answer:

7

Step-by-step explanation:

6×4=24

52-24=28

28÷4=7

Answer:

6960

Step-by-step explanation:

Answer:

x,y=(0,-7)

Step-by-step explanation:

Multiply eq2 by 3:

[tex]18x-3y=21\\18x+3y=-21[/tex]

Subtract:

[tex]-6y=42\\y=-7[/tex]

Substitute:

[tex]x=0[/tex]

Hope this helps :D

Answer:

P = ( -2, -4.5 )

Step-by-step explanation:

-2 on the x axis;

-4.5 on the y-axis.

Answer:

A=1,3,5,15

B=1,3,5,7,9,11,13,15

C=3,6,9,12,15

U=1,2,3,4,5,6,7,8,9,10,11,12,13,14,15

Answer:

easy

Step-by-step explanation:

the 1stone goes on the 1st one

the 4th ( on the side) one is for the 2nd one

the 5th one (on the side) is for the thrid one

and that goes for

change

Answer:

The hat is

Change: $5 increase

Proportion: 5/20= x/100

The shirt is

Change: $5 decrease

Proportion: 5/35= x/100

The shoe is:

Change: $10 increase

Proportion: 10/25= x/100

Step-by-step explanation:

Answer:

$40.23

Step-by-step explanation:

Answer:

40.23

Step-by-step explanation:

easy just do 13.5*2.98

Perimeter: 1\2

Area: 1\4

Answer:

$45

Step-by-step explanation:

Answer:

Step-by-step explanation:

1/2 + b + h

Okay so we know that b is 6 and that h is 10 so we can change the question to this : 1/2 + 6 + 10. We know that 1/2 is also writen as 0.5 , now all you need to do is 0.5 + 6 + 10 = 16.5 . The question asks to round to the nearest 10th so you need to add a 0 after the 5 so you can round up or down.

16.50

Now you need to look at the 10th number which is 5 and to round it up you need to look at the number after that which would be 0, we know that anything that is 4 or below gets rounded down so your answer for this question is simply 16.5.

I hope that helped you and good luck!

Answer:

y=5x-3

Step-by-step explanation:

Slope intercept form is y=mx+b and you know the slope so you can get y=5x+b

Then you are given a point, (2, 7), so you can plug that into the equation to find the y-intercept

7=5(2)+b

Then you just solve for b

7=10+b

-10

-3=b

So the final equation is y=5x-3

The required equation of the line passing through the point (2, 7) and having a slope of 5 is y - 5x = -3

The standard equation of the line using the point-slope form is expressed as:

y-y0 = m(x-x0)

m is the slope of the line

(x0, y0) is the point on the line

Given the following parameters

m =  5

(x0, y0) = (2, 7)

Substitute the given expressions into the formula as shown:

y - 7 = 5(x-2)

y - 7 = 5x - 10

y - 5x = -10 + 7

y - 5x = -3

Hence the required equation of the line passing through the point (2, 7) and having a slope of 5 is y - 5x = -3

Learn more here: https://brainly.com/question/17003809

Answer:

[tex]-7 < -4 < 0 < 7[/tex]

Step-by-step explanation:

Given

Change: -4, 7, -7 and 0

Required

Compare them

From the list of given options, we can observe that the inequality < is used in all options.

This implies that we arrange from least to highest

The least is -7

Then, -4

Then 0

And lastly, 7

So, we have:

[tex]-7 < -4 < 0 < 7[/tex]

Answer: is it –7<–4<0<7

Answer: 1 teaspoon

Step-by-step explanation:

The calculation on the number of teaspoons full that the infant should receive daily should be:

Ordered dose = 2.5 ml bid and this should be given twice a day.

Since it's take twice, the total dose for the day will be:

= 2.5 × 2

= 5.0ml

Since 1 teaspoon is equal to 5ml, it means that the teaspoon that the infant should receive daily is 1 teaspoon.

Answer:

nsnsuieieiwiwiweuejjeejeje

Answer:

[tex] \frac{1}{2} \times 7 \sqrt{2} - 36 \sqrt{2} \\ \frac{7 \sqrt{2} }{2} - 36 \sqrt{2} \\ \frac{65 \sqrt{2} }{2} \\ - 45.96[/tex]

Answer:

Step-by-step explanation:

You can't get a rational result. √2 does not go away.

√98  = √(49 * 2) = √7 * 7 * 2 = 7√2

6*√72 = 6 * √(2 * 2 * 2 * 3*3) = 6 * 2 * 3 √2 = 36√2

1/2 * 7√2 - 6*6*√2

√2 (3.5 - 36)

√2 * (-32.5) or

-32.5 * √2

Answer:

6042915 balls.

Step-by-step explanation:

Volume of a ping pong ball is;

V = (4/3)πr³

diameter of ping pong ball is given 4cm = 0.04 m

Radius; r = 0.04/2 = 0.02 m

V = (4/3)π(0.02³)

V = 0.00003351032 m³

Room is 9.5 meters long, 7.5 meters wide, and 3 meters high.

Volume; V = 9 × 7.5 × 3 = 202.5 m³

Number of ping pong balls that will fit into the room = volume of room/volume of ping pong balls = 202.5/0.00003351032 = 6042914.540956151

Approximately 6042915 balls.

Answer:

C. [tex] \overline{GI} < \overline{GH} < \overline{HI} [/tex]

Step-by-step explanation:

In a triangle, the longest side is opposite to the largest measure of angle. The medium side is opposite to the medium angle, while the shortest side is opposite to the smallest angle.

In ∆GHI,

✍️m<G = 95°, it is opposite to [tex] \overline{HI} [/tex]

<G is the largest angle, therefore, [tex] \overline{HI} [/tex] is the longest side.

✍️m<I = 180 - (95 + 38) = 47°.

<I is opposite to [tex] \overline{GH} [/tex]

<I is the medium angle, therefore, [tex] \overline{GH} [/tex] is the medium side.

✍️m<H = 38°, it is opposite to [tex] \overline{GI} [/tex]

<h is the smallest angle, therefore, [tex] \overline{GI} [/tex] is the shortest side.

✅This means:

[tex] \overline{GI} < \overline{GH} < \overline{HI} [/tex]