All categories

4 years ago

Explain how to estimate 368+231 in two different ways

Mathematics

1 answer:

Nesterboy [21]4 years ago

8 0

Estimate the sum in two different ways:

A) By rounding off to the highest place value (hundreds):

368 = 400 (3 hundreds is the highest place value)

231 = 200 (2 hundreds is the highest place value)

400 + 200 = 600

B) By rounding off to the second highest place value (tens):

368 = 370

231 = 230

370 + 230 = 600

Hope this helps!

You might be interested in

Upon registration, new members of the American cD club receive 30 cDs for review. Each month the club sends its members 2 more c

Pani-rosa [81]

520 CD's because of the 9 months and we add 30 time 9 we erase the 0 and multiply the 3 with the 9 it will be 27 right we add the zero because the originla number is 30

6 0

3 years ago

How to find the Perimeter?

SOVA2 [1]

Answer:

8+2 $\sqrt{20\\}\\$

Step-by-step explanation:

2+2+2+2+ $\sqrt{20\\}\\$ + $\sqrt{20\\}\\$ =8+2 $\sqrt{20\\}\\$

4^2+2^2=h^2

20=h^2

h= $\sqrt{20\\}\\$

7 0

3 years ago

the width of a rectangle is 3 inches, and the area is 88 square inches. What are the length and width of the rectangle

inessss [21]

Answer:

length is 29.3, width is 3

Step-by-step explanation:

A= L×W

and if A = 88 and W is 3

88= L×3

Divide

88/3

legth =29.3

8 0

3 years ago

A grocery store had 38 employees, but then they hired 4 more people. What is the percent change in their staff?

gizmo_the_mogwai [7]

The percentage change in the staff strength of the grocery store is 10.53%.

<h3>How to find the percentage change?</h3>

We are given;

Number of employees in store = 38 employees

Number of additional people hired = 4 employees

Thus, percentage change in their staff is;

4/38 * 100% = 10.53%

Thus, the percentage change in the staff strength of the grocery store is 10.53%.

Read more about Percentage change at; brainly.com/question/2085058

#SPJ1

7 0

3 years ago

Find the value of x such that the area of a triangle whose vertices have coordinates (6, 5), (8, 2) and (x, 11) is 15 square uni

Serjik [45]

Answer:

$x =12\ or\ -8$

Step-by-step explanation:

Given

$(x_1,y_1) = (6,5)$

$(x_2,y_2) = (8,2)$

$(x_3,y_3) = (x,11)$

$Area = 15$

Required

Find x

The area is calculated as thus:

$Area = \frac{1}{2}|x_1(y_2 - y_3) + x_2(y_3 - y_1) + x_3(y_1 - y_2)|$

Substitute values

$15 = \frac{1}{2}|6*(2 - 11) + 8*(11 - 5) + x(5 - 2)|$

$15 = \frac{1}{2}|6*(-9) + 8*(6) + x(3)|$

$15 = \frac{1}{2}|-54 + 48 + 3x|$

$15 = \frac{1}{2}|-6 + 3x|$

Multiply through by 2

$2 * 15 = \frac{1}{2}|-6 + 3x| * 2$

$30 = |-6 + 3x|$

Remove absolute sign

$30 = -6 + 3x\ or\ -30 = -6 + 3x$

Add 6 to both sides

$36 = 3x\ or\ -24 = 3x$

Divide by 3

$12 = x\ or\ -8 = x$

$x =12\ or\ -8$

<em>So, the coordinates are (-8, 11) or (12,11)</em>

3 0

3 years ago