What is the answer to this??

My 11 year old came home with this math problem. 1.5 [ 3( 14.5 +7 ) -3 ] - 7.4

nikitadnepr [17]

The solution of given problem 1.5 [ 3( 14.5 +7 ) -3 ] - 7.4 is 84.85

<em><u>Solution:</u></em>

Given problem is:

1.5 [ 3( 14.5 +7 ) -3 ] - 7.4

We have to use BODMAS rule to solve the problem

According to Bodmas rule, if an expression contains brackets ((), {}, []) we have to first solve or simplify the bracket followed by of (powers and roots etc.), then division, multiplication, addition and subtraction from left to right

Thus in the given problem, first we have to solve for brackets

Add 14.5 and 7 inside the brackets

$\rightarrow 1.5 [ 3( 14.5 +7 ) -3 ] - 7.4\\\\\rightarrow 1.5 [ 3(21.5) - 3 ] - 7.4$

Multiply 3 with 21.5

$\rightarrow 1.5[64.5-3] - 7.4$

Now again solve for brackets by subtracting 3 from 64.5

$\rightarrow 1.5 \times 61.5 - 7.4$

Now perform multiplication of 1.5 and 61.5

$\rightarrow 92.25 - 7.4$

Now perform subtraction

$\rightarrow 92.25 - 7.4 = 84.85$

Thus the solution of given problem is 84.85

7 0

4 years ago

The ratio between the volumes of two cubes is 125 to 126. What is the ratio between their perspective surface areas?

Triss [41]

Can you google that?, i also need that answer

4 0

3 years ago

Triangle ABC has vertices A(4, 5), B(0, 5), and C(3, –1). The triangle is translated 3 units to the left and 1 unit up. What are

IgorC [24]

The coordinates of point B' are (-3, 6).

<h2>Given that</h2>

Triangle ABC has vertices A(4, 5), B(0, 5), and C(3, –1).

The triangle is translated as 3 units to the left and 1 unit up.

<h3>We have to determine</h3>

What are the coordinates of B' after the translation?

<h3>According to the question</h3>

Triangle ABC has vertices A(4, 5), B(0, 5), and C(3, –1).

The triangle is translated as 3 units to the left and 1 unit up.

To find the coordinates of B', we will shift the x-coordinate of point B to left by 3 units and the y-coordinate of point B to 1 unit up.

After the given transformation the coordinates of point B' would be:

$\rm B(0, \ 5) = B (0-3, \ 5+1) = B(-3, \ 6)$

Therefore, the coordinates of point B' are (-3, 6).

To know more about Transformation click the link given below.

brainly.com/question/26252571

4 0

2 years ago

Read 2 more answers

HELP!!!!!! INEQUALITYS!!!! SELECT ALL THAT APPLY!!!!!!!!!!!!

Annette [7]

G E and F your well-being have a good ☝ one

6 0

3 years ago

Read 2 more answers

The usual life of a computer terminal at a university computer center is known to be normally distributed with a mean of 3.25 ye

UNO [17]

Answer:

a) 0.6915; b) 2.83 years

Step-by-step explanation:

For part a,

The formula for a z score is

$z=\frac{X-\mu}{\sigma}$

Our mean, μ, is 3.25 and our standard deviation, σ, is 0.5.

This gives us

z = (3-3.25)/0.5 = -0.25/0.5 = -0.5

Using a z table, we see that the area under the curve to the left of this is 0.3085. However we want the area to the right; this means we subtract from 1:

1-0.3085 = 0.6915

For part b,

We look in the cells of a z table to find the value closest to 20%, or 0.2000. This is 0.2005, which corresponds with a z score of -0.84:

-0.84 = (X-3.25)/0.5

Multiply both sides by 0.5:

0.5(-0.84) = ((X-3.25)/0.5)(0.5)

-0.42 = X-3.25

Add 3.25 to each side:

-0.42+3.25 = X-3.25+3.25

X = 2.83

The advertised life would be 2.83 years.

8 0

3 years ago