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3 years ago

Homework help

Mathematics

1 answer:

photoshop1234 [79]3 years ago

8 0

1.) 20 miles for his round trip each day

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What is

Sergeeva-Olga [200]

Answer:

Standard form of the equation is:

∴ $3x+y=23$

Step-by-step explanation:

Given equation:

$y-2=-3(x-7)$

To convert the given equation to standard form of equation:

$A(x)+B(y)=c$

Using distribution.

$y-2=(-3x)+(-3\times-7)$

$y-2=-3x+21$

Adding 2 both sides.

$y-2+2=-3x+21+2$

$y=-3x+23$

Adding $3x$ to both sides.

$3x+y=3x-3x+23$

∴ $3x+y=23$

6 0

4 years ago

Each second for 4 seconds, an elevator descends 10 feet. Find the total change in elevation.

NISA [10]

(4 sec) * (-10 ft/sec) = -40 ft.

5 0

4 years ago

17% of what number is 3.4

saw5 [17]

Answer:

Step-by-step explanation:

We already have our first value 3.4 and the second value 17. Let's assume the unknown value is Y which answer we will find out.

As we have all the required values we need, Now we can put them in a simple mathematical formula as below:

Step 1 ---> 3.4 = 17% × Y

Step 2 ---> 3.4 = 17/100 × Y

Multiplying both sides by 100 and dividing both sides of the equation by 17 we will arrive at:

Step 3 ---> Y = 3.4 × 100/17

Step 4 ---> Y = 3.4 × 100 ÷ 17

Step 5 ---> Y = 20

Finally, we have found the value of Y which is 20 and that is our answer.

<h3>*You can easily calculate 3.4 is 17 percent of what number by using any regular calculator, simply enter 3.4 × 100 ÷ 17 and you will get your answer which is 20*</h3>

4 0

3 years ago

Factor completely x2 + 16. (x + 4)(x + 4) (x + 4)(x − 4) Prime (x − 4)(x − 4)

Sindrei [870]

It's prime because the constant term is positive and there is no middle term. If it were x^2 - 16, we could use (x+4)(x-4), but because 16 is positive, it cannot be factored

4 0

3 years ago

Diners frequently add a 15% tip when charging a meal to a credit card. What is the price of the meal without the tip if the amou

yuradex [85]

Question:

Diners frequently add a 15% tip when charging a meal to a credit card. What is the price of the meal without the tip if the amount charged is $20.70? How much was the tip?

Answer:

Price of meal = $18

Tip price = $2.70

Step-by-step explanation:

Let the price of the meal be y;

Let the tip be t

From the question;

15% of y is the tip charge (t). i.e

t = 15%y

=> t = 0.15y --------(i)

The total amount charged is $20.70 (This means that the sum of the price of the meal and the tip is $20.70)

=> y + t = 20.70 [substitute the value of t=0.15y from equation (i)]

=> y + 0.15y = 20.70

=> 1.15y = 20.70

=> y = $\frac{20.70}{1.15}$

=> y = $18

Therefore the price of the meal, y, is $18.

From equation (i),

t = 0.15y [substitute the value of y = $18]

t = 0.15(18)

t = $2.70

Therefore the tip was $2.70

6 0

3 years ago