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3 years ago

What are the 2 numbers ?

Mathematics

1 answer:

gizmo_the_mogwai [7]3 years ago

6 0

Answer:

Option D, 15 and 10

Step-by-step explanation:

Step 1: Convert the words into an expression

A number is 5 less than 2 times another number. Their sum is 25.

2x - 5 = 25

Step 2: Solve for x

2x - 5 + 5 = 25 + 5

2x / 2 = 30 / 2

x = 15

Answer: Option D, 15 and 10

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David bought a computer than was 20% off the regular price of $ 1,080. if an 8% sales tax was added to the cost of the computer,

Ne4ueva [31]

Answer:

the anwser would be $933.12

Step-by-step explanation:

1080*.2= 216, so $216 was taken off

1080-216= 864 is the price now

864*.08= 69.12, The sales tax is $69.12

864+69.12= $933.12

The total price David paid for is $933.12

7 0

3 years ago

When truckers are on long-haul drives, their driving logs must reflect their average speed. Average speed is the total distance

bekas [8.4K]

a) $v=\frac{d_{tot}}{t_{tot}}=\frac{(3 h)(60 mph)+20 mi}{3 h +t_2}$

The average speed is equal to the ratio between the total distance ( $d_{tot}$ and the total time taken ( $t_{tot}$ ):

$v=\frac{d_{tot}}{t_{tot}}$

the distance travelled by the trucker in the first 3 hour can be written as the time multiplied by the velocity:

$d_1 = (3 h)(60 mph)=180 mi$

So the total distance is

$d_{tot}=d_1 +d_2 = 180 mi+20 mi=200 mi$

The total time is equal to the first 3 hours + the time taken to cover the following 20 miles in the city:

$t_{tot}=3 h +t_2$

So, the equation can be rewritten as:

$v=\frac{d_{tot}}{t_{tot}}=\frac{(3 h)(60 mph)+20 mi}{3 h +t_2}$

b) 0.50 h (half a hour)

Since we know the value of the average speed, $v=57.14 mph$ , we can substitute it into the previous equation to find the value of $t_2$ , the time the trucker drove in the city:

$v=\frac{200 mi}{3h +t_2}\\3h+t_2 = \frac{200 mi}{v}\\t_2 = \frac{200 mi}{v}-3h=\frac{200 mi}{57.14 mph}-3 h=0.50 h$

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3 years ago

M< AOB + m < 96= m <139

san4es73 [151]

139 = x + (2x + 10)
139 = 3x + 10
129 = 3x
/3 /3
43 = x

Therefore

5 0

3 years ago

Find cos(ZA). Choose 1 answer:

lbvjy [14]

Answer: option A. 24 / 25

Step-by-step explanation:

Cos (Z) = Adj / Hypo

Cos (Z) = 24 / 25

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3 years ago

Rewrite this expression using appropriate conventions. (a+a+a+a) / 5

Elza [17]

Answer:

4a/5

Step-by-step explanation:

(a+a+a+a) / 5

Combine like terms

4a/5

6 0

3 years ago