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3 years ago

A tortoise is walking in the desert. it takes 3 minutes to walk 4.8 meters. what is its speed?

1 answer:

8 0

We have to know divide the total meters that has been traveled by the tortoise which is for 4.8 meters to the time it was completed which is 3 minutes. The formula for speed is: [ speed = distance/time ]. So the equation will be 4.8 meters/3 minutes = 1.6 meters per minute. The speed of the tortoise is 1.6 meters per minute.

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When writing a number in scientific notation, if you move the decimal point to the left 3 places, then you must _____. multiply

Naddika [18.5K]

Answer:

Multiply by 10.

Step-by-step explanation:

When writing a number in scientific notation, if you move the decimal point to the left 3 places, then you must multiply by 10.

6 0

3 years ago

What is the solution of the equation x2 + 8x + 5 = 0?

Setler79 [48]

Answer:

x = -0.683 (3dp)

x = -7.317 (3dp)

Step-by-step explanation:

Step 1: Apply the quadratic formula

(-b±( $\sqrt{b^{2}-4ac}$ )) / 2a

a = 1 (x²)

b = 8 (8x)

c = 5 (5)

(-8±( $\sqrt{8^{2}-4 x 1 x 5}$ )) / 2 x 1

Step 2: Simplify

(-8±( $\sqrt{44}$ )) / 2

Step 3: Solve

You need to replace the ± with first a + and then a -.

(-8+( $\sqrt{44}$ )) / 2 = -0.683 (3dp) = x

(-8-( $\sqrt{44}$ )) / 2 = -7.317 (3dp) = x

Hope this helps!

5 0

3 years ago

Solve. 8+2=16106. 5+4=2091. 9+6=54153. 7+5=35122. 20+3=602317. 30+1=303129. 18+4=722214. 10+5=??

Sergio [31]

answer:

505155

step-by-step explanation:

multiply, add, and subtract the first two numbers of the equation in that order to get the final number

8 + 2 = 16106: 8 x 2 = 16, 8 + 2 = 10, 8 - 2 = 6 to get the number 16106

5 + 4 = 2091: 5 x 4 = 20, 5 + 4 = 9, and 5 - 4 = 1 to get the number 2091

9 + 6 = 54153: 9 x 6 = 54, 9 + 6 = 15, and 9 - 6 = 3 to get the number 54153

7 + 5 = 35122: 7 x 5 = 35, 7 + 5 = 12, and 7 - 5 = 2 to get the number 35122

20 + 3 = 602317: 20 x 3 = 60, 20 + 3 = 23, and 20 - 3 = 17 to get the number 602317

30 + 1 = 303129: 30 x 1 = 30, 30 + 1 = 31, and 30 - 1 = 29 to get the number 303129

18 + 4 = 722214: 18 x 4 = 72, 18 + 4 = 22, and 18 - 4 = 14 to get the number 722214

10 + 5 = 505155: 10 x 5 = 50, 10 + 5 = 15, and 10 - 5 = 5 to get the number 505155

6 0

3 years ago

Find the solution of the system of equations. 15x -4y = -50 3x - 2y = -16

Fittoniya [83]

Answer:

15x - 4y =-50 -----(i)

3x - 2y=-16 --------(ii)

Using Substitution

From (i)

15x=4y-50

x=4y-50/15

Substitute x=4y-50/[15] into eqn (ii)

3x - 2y= -16

3[4y-50]/15 - 2y =-16

Multiply through by 15 to clear the fraction

3(4y - 50) - 30y=-240

12y - 150 -30y=-240

12y-30y=-240+150

-18y = -90

y=90/18

y=5.

Substitute into any eqn of choice to get x

3x - 2y=-16

3x - 2(5)=-16

3x - 10=-16

3x=-16+10

3x=-6

x=-6/3

x=-2.

x= -2

y=5

5 0

2 years ago

What is 6 2/5 added by 2 3/10.Make sure your answer is fully reduced

slava [35]

Answer:

8 7/10

Step-by-step explanation:

6 0

2 years ago

Read 2 more answers