MATHEMATICS HIGH SCHOOL

Rebecca complete four addition problems each minute. How many minutes will it take her to complete 12 problems?

Answers

Answer 1
Answer:

If Rebecca completes four addition problems each minute, it would take her 3 minutes to complete 12 problems.
Answer 2
Answer:

Answer:

3 minutes

Step-by-step explanation:

we get the 12 problems divide by the 4 problems

and we get 3 problems

there are 3groups of 4problems in 12 problems

then each group takes 1 minute which makes

3 groups of 4problems multiplied by 1 minute to get 3 minutes

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1. The exponential function modeled below represents the number of squarekilometers of land occupied by cane toads x years after this animal was first introduced into Australia, Area Occupied by Cane Toads Time Area 1,200 (y) (km) 1,100 1,000 0 36,500 900 5 53,600 800 700 10 78,800 600 15 115,780 500 20 170,120 400 25 250,000 300 200 30 367,300 100 539,700 0 5 10 15 20 25 30 35 Time (y) Based on the data, which measurement is closest to the number of square kilometers of land that will be occupied by cane toads 40 years after this Area (thousands of km) 35 < PREVIOUS
Point-slope form to slope-intercept form
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Choose the correct product of (9x − 5)(9x + 5).81x2 + 90x + 25 81x2 − 25 81x2 + 25 81x2 − 90x + 25
-58 + x = -92Pls helpppp

Is 2,-5,-12,-19,-26 an arithmetic sequence

Answers

Yes!
-5 - 2 = -7;
-12 - (-5) = -7;
-19 -(-12) = -7;
-26 -(-19) = -7.

Answer:

subtract 7 each time

Step-by-step explanation:

0.55 as fraction
in simplest form

Answers

0,55 = (55)/(100)

(55)/(100) = (11)/(20)

Nice days..........

Using a tape measure Becky Jo found that the circumference of the great redwood was 900cm. She estimated that its diameter was 300cm. Was her estimate a little too large or a little too small? Why?

Answers

The length of the circle - the product of the diameter and the number Pi
l = dπ
l = 900cm
π ≈ 3,1415 przyjmiemy wartość 3
900cm = d* 3   [:3
d = 300cm  
Becky rounded value of Pi , hence the difference in result

More accurate calculation

l = d*π
900cm = d*3,1415
d = 900cm : 3,1415 = 286,49cm

Becky overestimated the outcome

2x plus 4 in vertex form

Answers

Vertex form only applies to quadratics. A quadratic is a polynomial with 2 being the largest exponent. I don't see any x^2 term here. Please check the problem to make sure that it's typed correctly. 

1. Raymond is repairing wires on a radio broadcast tower. He is in a basket of the repair truck40m from the tower. When he looks up, he estimates the angle of elevation to the top of the
tower as 42°. When he looks down, he estimates the angle of
depression to the bottom of the tower as 32°. How high is the tower
to the nearest tenth of a metre?

Answers

The required height of the tower is given as 61 meters.

What are trigonometric equations?

These are the equation that contains trigonometric operators such as sin, cos.. etc.. In algebraic operation.

What are Pythagorean triplets?  

In a right angled triangle, its side, such as hypotenuse, perpendicular and base  is Pythagorean triplets.

here,
To determine the height of the tower,
h = 40 tan 32° + 40 tan 42°
h = 61 m

Thus, the required height of the tower is given as 61 meters.

Learn more about trigonometry equations here:

brainly.com/question/22624805

#SPJ2

Answer:

Step-by-step explanation:

h = 40 tan 32° + 40 tan 42° ≈ 61.0 m

the sum of Marys age and her moms age is 67.  Three times Marys age increased by 7 is her moms age.  How old is Mary and her mother

Answers

Sove the system:

x: Mary´s age
y: Mom´s age:

x + y = 67
3x + 7 = y

Replace y in the first equation:

x + 3x + 7 = 67
4x = 67 - 7
4x = 60
x = 15 yrs.

y = 67  - 15 = 52 yrs
Labels:
-- Mary's age = D (for 'daughter')
-- Mom's age = M (for 'mom')

The problem says 2 things:

         D + M = 67
and
       3D + 7 = M .

Let's subtract 'M' from each side of the first one:  D = 67 - M

Now we can plug that into the second one, in place of 'D'.
 
       3D          + 7 = M

       3(67 - M) + 7 = M .

Clear the parentheses on the left side.  I assume you know how to do that.

       201 - 3M + 7 = M

Add 3m to each side:

       201        + 7 = 4M

       208              = 4M

Divide each side by 4 :

       52 = Mom's age

Daughter's age = 67 - Mom's age = 67 - 52 = 15
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