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4 years ago

What is 9 times 52 using mental math property

1 answer:

3 0

Everyone works differently in mental meth.

To calculate 9*52, we note that 9=10-1, so mentally calculate
9(52)
=(10-1)(52)
=520-52 [ subtract 20 from each number]
=(520-20)-(52-20)
=500-32
=468.

Alternatively,
9*52=9*50+9*2=450+18=468

If you're good with multiplication and division,
9*52=3*3(52)=3*156=450+18=468

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The endpoints of a segment are (–5, –3) and (0, 2). What are the endpoints of the segment after it has been translated 4 units u

Artist 52 [7]

4 units up means 4 is added to the y-coordinate

(-5, -3 + 4) and (0, 2 + 4)

= (-5, 1) and (0, 6)

Answer: B

6 0

3 years ago

Read 2 more answers

The coordinates for three points of a rectangle are (2, 6) (2, 9) and (8, 6). What is the coordinate for the fourth point in the

saw5 [17]

Answer:

(8,9)

Step-by-step explanation:

Given

$A = (2,6)$

$B = (2,9)$

$C = (8,6)$

Required

Determine the 4th point

The coordinate point of a horizontal or a vertical rectangle is given as:

(x1,y1), (x2,y2), (x3,y3), (x4,y4)

Where:

$x_1 = x_2$ $x_3 = x_4$ $y_1 = y_3$ $y_2 = y_4$

So, we have:

$A = (2,6)$ --- $(x_1.y_1)$

$B = (2,9)$ ---- $(x_2.y_2)$

$C = (8,6)$ ---- $(x_3,y_3)$

Using the above equations:

$x_3 = x_4$ $=8$

$y_2 = y_4$ $= 9$

Hence, the coordinate of the 4th point is:

$(x_4,y_4) = (8,9)$

4 0

3 years ago

Find the area of the circle with the given radius or diameter. Use = 3.14. d = 10

valkas [14]

Formula for finding the area of a circle: $A = \pi r^2$
We need to radius but we only have the diameter.

Luckily for us, if you have the diameter, you have the radius.
Because the radius is the diameter over 2.

10 / 2 = 5

Plug in the values.

A = (3.14)5^2
A = (3.14)25
A = 78.5

So, the answer is 78.5.

5 0

3 years ago

Read 2 more answers

I need help with this problem

balu736 [363]

Answer:

2.1000x10^03

Step-by-step explanation:

7 0

2 years ago

A thermometer reading 7 °C is brought into a room with a constant temperature of 34°C. If the thermometer reads 14 °C after 4 m

never [62]

For this case we are going to define the following variable:
x: time in minutes
We write the linear function that represents the problem:
t (x) = (14/4) x + 7
For x = 6 we have:
t (6) = (14/4) * (6) + 7
t (6) = 28 ° C
For x = 11 we have:
t (11) = (14/4) * (11) + 7
t (11) = 45.5 ° C
Answer:
t (6) = 28 ° C
t (11) = 45.5 ° C

6 0

3 years ago