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3 years ago

Evaluating Expression a - 5 - b; use a = 10, and b = 4

Mathematics

2 answers:

Julli [10]3 years ago

7 0

A=10 b=4
Substitute the variables in for the numbers shown.

(10) - 5 - (4)

10 - 5 - 4
10 - 9
=
1

Naya [18.7K]3 years ago

4 0

10-5-4=1 because 10-5 is 5 and 5-4 is 1

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The speed of light is about 1.86×10^5 miles per second. The star Sirius is about 5.062×10^13 miles from Earth. About how many se

marysya [2.9K]

Answer:

2.72 × 10^8 seconds

Step-by-step explanation:

1. Organize the given information to help you create the equation:

- Light travels 1.86 × 10^5 miles per 1 second

- Light travels 5.062 × 10^13 miles per n seconds

- Need to solve for n

2. Set up the equation (Make sure that both numerators and both denominators match units, so the seconds are either both on top or both on bottom, NOT switched):

$\frac{1.86 * 10^5}{1}$ = $\frac{5.062 * 10^1^3}{n}$

3. Cross multiply (Multiply the first fraction's numerator by the second's denominator, and vice versa. It doesn't matter what number is on which side of the = sign)

n × (1.86 × 10^5) = 5.062 × 10^13

4. Solve for n by isolating the variable and dividing.

$\frac{n (1.86 * 10^5)}{1.86 * 10^5}$ = $\frac{5.062 * 10^1^3}{1.86 * 10^5}$

n = $\frac{5.062 * 10^1^3}{1.86 * 10^5}$

n = 2.72 × 10^8 (Make sure to include the unit, seconds)

4 0

3 years ago

Akira and a business associate agree to invest in a project estimated to cost $1.8 million (1,800,000). They decide to split the

MariettaO [177]

If it's relationship Akira : Business A. = 7:5

The part of Akira is 7k

and the part of the Business A. is 5k

Then

7k+5k=12k => 12k=1,800,000 => k= 1,800,00/12=150,000$

Akira part is 7k= 7 * 150,000 = 1,050,000$

Good luck!!!!

8 0

3 years ago

What is 25% of 3.7?

telo118 [61]

It should be 0.925, 1/4*3.7=0.925 hope this helps!

7 0

3 years ago

Read 2 more answers

In 1970 there were 160 African American women in elected public office in the United States. By 1993 the number had increased to

timama [110]

Answer:

Average rate of change for the number of African American women who held office at any given time between 1970 & 1993 is 94.43.

Step-by-step explanation:

Here, according to the question:

Number of African American women in elected public office in the United States in the year 1970 = 160

Number of African American women in elected public office in the United States in the year 1993 = 2332

Now, the change in the number of elected women between 1970 & 1993

= Women elected in the year 1993 - Women elected in the year 1970

= 2332 - 160 = 2,172

or, the change in the number of elected women candidates between 1970 & 1993 is 2,172

Now, the difference in the time period is 1993 - 1970 = 23 years

So, $\textrm{The average rate of change} = \frac{\textrm{Total change in the quantity}}{\textrm{Time Interval}} \\=\frac{2172}{23} = 94.43$

Hence, the average rate of change for the number of African American women who held office at any given time between 1970 & 1993 is 94.43.

6 0

4 years ago

C(t)=2(t-4)(t+1)(t-6)

Licemer1 [7]

Can y’all help me in my recent

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3 years ago