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Kazeer [188]
3 years ago
7

it took 48 minutes to drive downtown. An app estimated it would be less than that. If the error was 20%, what was the apps estim

ate?
Mathematics
1 answer:
natulia [17]3 years ago
8 0

Answer:

38.4

Step-by-step explanation:

it took 48 minutes and the app miss estimated by 9.6, which is 20% of 48. So subtract 9.6 from 48 and you will get 38.4

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How do you Factor this equation
algol [13]

Answer:

(x+4)(x+4)

Step-by-step explanation:

The middle number is 8 and the last number is 16. Factoring means we want something like (x+_)(x+_). We need two numbers that add together to get 8 and multiply together to get 16. The number 4 works perfectly in this equation. That's why (x+4)(x+4) is the factor of the equation x^2 + 8x + 16.

5 0
2 years ago
Find the slope of the line containing the points (2,-5) and (-4,9)
eimsori [14]

Answer:

The slope would be -2  1/3 or -2.3 repeating

Step-by-step explanation:

The first point would be (-4, 9). The next point is (2, -5). We can tell that the slope will be negative, because the x values increased by 6, but the y values decreased by 4.

The slope would be -2  1/3 or -2.3 repeating

I Hope That This Helps! :)

5 0
2 years ago
Laura collects nickels and dimes she has a total of 47 nickels and dimes she calculated the value of the coins and found out she
Gre4nikov [31]

Answer:

Number of dimes = 34

Number of nickels = 13

Step-by-step explanation:

Total number of coins = 47

Coins are in the form of nickels and dimes.

Value of a nickel = 5 cents

Value of a dime = 10 cents

Total value of coins = $4.05 or 405 cents

To find:

Number of nickels and dimes?

Solution:

Let number of nickels = x

Money value of nickels = 5x

Let number of dimes = y

Money value of dimes = 10y

Total value of coins = 5x+10y

This value is given as equal as 405.

As per question statement, the equations can be written as:

5x+10y = 405 ..... (1)\\x+ y = 47 ...... (2)

Multiplying equation (2) with 5 and subtracting from equation (1):

10y - 5y = 405 - 235  \\\Rightarrow 5y = 170\\\Rightarrow y = 34

Number of dimes = 34

Number of nickels  = 47 - 34 = 13

6 0
3 years ago
Two 120 resistors are connected in parallel across voltage supply of 10 vdc what’s the current in this circuit
Daniel [21]

Answer: 0.167

Step-by-step explanation:

This is an applied mathematics question

Resistors in parallel  ⁾/R = ¹/₁₂₀ + ¹/₁₂₀ since the resistor is two 120

Therefore , resolve into fraction now yield

                       ¹/R                              =         1 + 1  

                                                                    -------

                                                                     120

                                                          =         2/120

                                                          =          ¹/₆₀

Therefore,                                  ¹/R   =      ¹/₆₀

 Cross multiply to get R the resistance

                                                      R  =  60

From formula,                                V = IR where I is the current

There fore making I the subject of the formula

                                                        I = V/R

                                                          = 10/60

                                                          = 0.166

                                                          = 0.167 A, A = ampere which is the unit of current.

                   

4 0
3 years ago
75% of a university’s freshman class are majoring in engineering. if 3000 students in the freshmen class are engineering majors,
elixir [45]

Answer:

4000

Step-by-step explanation:

75% of 4000, is 3000. Hope this helps! :)

8 0
3 years ago
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