All categories

2 years ago

Item 4

Mathematics

2 answers:

Simora [160]2 years ago

5 0

Answer:

270 s

Step-by-step explanation:

4 minutes = 240s

add the other 30s

boom

BigorU [14]2 years ago

4 0

Sam biked for 270 s

60 x 4 = 240
240 + 30 = 270 s

You might be interested in

my yearly income is 18,000. My medical insurance premium is 230 a month. Is my medical premium 9.66% less then yearly income?

JulijaS [17]

NO.....9.66% less than $18,000 is $16,261.20
230×12= $2,760

7 0

3 years ago

Let x^2+15x=49

Slav-nsk [51]

<span>x^2 + 15x + 56.25 = 105.25

"Completing the square" is one of many different techniques for solving a quadratic equation. What you do is add a constant to both sides of the equation such that the lefthand side can be factored into the form a(x+d)^2. For instance, squaring (X+D) = X^2 + 2DX + D^2. Notice the 2DX term. That is the same term as the 15x term in the problem. So 2D = 15, D = 7.5. And D^2 = 7.5^2 = 56.25.
So we have
x^2 + 15x + 56.25 = 49 + 56.25
Which is
x^2 + 15x + 56.25 = 105.25
Which is the answer desired.

Now the rest of this is going beyond the answer. Namely, it's answering the question "Why does complementing the square help?" Well, we know that the left hand side of the equation can now be written as
(x+7.5)^2 = 105.25

Now take the square root of each side
(x+7.5) = sqrt(105.25)

And let's use both the positive and negative square roots.
So x+7.5 = 10.25914226
and
x+7.5 = -10.25914226

And let's find X.
x+7.5 = 10.25914226
x = 2.759142264

x+7.5 = -10.25914226
x = -17.75914226

So the roots for x^2 + 15x - 49 is 2.759142264, and -17.75914226</span>

3 0

3 years ago

Read 2 more answers

Which is greater 12 cups or 3 quarts

Zielflug [23.3K]

Neither is greater.

1 quart = 4 cups
2 quarts = 8 cups
3 quarts = 12 cups

So they're equal.

4 0

3 years ago

There are three times as many people at the baseball park today than there were yesterday. Today’s attendance is 15,000. Define

Verizon [17]

The equation is:

3 x = 15,000 where x is the number of yesterday’s attendance

Step-by-step explanation:

There are three times as many people at the baseball park today than

there were yesterday

Assume that the number of the people at the baseball park

yesterday is x

∵ The number of the people at the baseball park yesterday = x

∵ The number of people at the baseball park today is three times

as many as the number of the people yesterday

∴ The number of people at the baseball park today = 3 x ⇒ (1)

∵ Today’s attendance is 15,000

∴ The number of people at the baseball park today = 15,000 ⇒ (2)

- Equate (1) and (2)

∴ 3 x = 15,000

- To find the value of x solve the equation:

3 x = 15,000

The equation is:

3 x = 15,000 where x is the number of yesterday’s attendance

Learn more:

You can learn more about equations in brainly.com/question/11229113

#LearnwithBrainly

4 0

3 years ago

An airline charges more money for bags weighing over 50 pounds. Your bag weighs 45.83 pounds. How much more weight can you put i

sveta [45]

Answer:

4.17 Pounds

Step-by-step explanation:

To get to 50 pounds you have to subtract 50 by the amount of weight on your own bag, so 50-45.83. That would get you 4.17. Hope this helps!

4 0

3 years ago