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3 years ago

Use the formula for simple interest to find the interest rate if a deposit of $1400 earned $490 of interest after 5 years,

1 answer:

7 0

Given the simple interest formula:

I = P•R•T

where:
I = interest
P = principal
R = interest rate
T = time (in years)

We can isolate R algebraically to find out the interest rate:

I = P•R•T

Divide both sides by P•T:

I / (P•T) = (P•R•T)/(P•T)

The formula for the interest rate is:
R = I / (P•T)

Substitute the given values into this formula to solve for the interest rate (R):

R = I / (P•T)

R = $490/ ($1,400 • 5 years)
R = $490 / $7,000
R = 0.07 or 7%

Therefore, the interest rate is 7%.

Please mark my answers as the Brainliest if you find my explanations and solution helpful :)

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Blizzard [7]

Answer:

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Step-by-step explanation:

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3 years ago

en un grupo de estudiantes de tercero de secundaria, 38 son diestros y 6 son zurdos. encuentra la razon de diestros con relacion

svetlana [45]

Answer:

The ratio is $\frac{19}{3}$

Step-by-step explanation:

The question in English is

In a group of high school third graders, 38 are right-handed and 6 are left-handed. find the ratio of right-handed to left-handed

Let

x -----> number of students that are right-handed

y -----> number of students that are left-handed

we know that

To find out the ratio of right-handed to left-handed, divide the number of students that are right-handed by the number of students that are left-handed

$\frac{x}{y}$

we have

$x=38\ right-handed\\y=6\ left-handed$

substitute

$\frac{38}{6}$

Simplify

$\frac{19}{3}$

4 0

3 years ago

2x+3x^2(4x-5)<br> please helpppp asap

Aliun [14]

Here's my step-by-step explanation:

We're just gonna factor.

If your teacher has spoken of FOIL, then he/she has probably said that it means First Outer Inner Last and that it helps with distributing problems like these.

Right, so let's get to it.

$2x+3x^2 (4x-5)\\2x(4x-5)+3x^2(4x-5)\\2x(4x) + 2x(-5) + 3x^2(4x) + 3x^2(-5)$

Can you see the FOIL method being spread out here? Let's keep going.

$2x(4x) + 2x(-5) + 3x^2(4x) + 3x^2(-5)\\8x^2 + (-10x) + 12x^3 + (-15x^2)\\12x^3 + 8x^2 - 15x^2 -10x\\12x^3 -7x^2 -10x$

Hope this helps, and let me know if I made a mistake! ^_^

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3 years ago

Please can somebody find the gradient and the coordinates of the y-intercept for the graph:

-Dominant- [34]

The equation is already is slope intercept form where you can easily point out the gradient, or the slope, and the y intercept.
y=mx+b where m is the gradient, and b is the y intercept.
Since there is no m, the gradient is 1.
The y intercept had x=0 and y=b
b in this case is 6
the y intercept= (0,6)

8 0

4 years ago

The length of a river is 480 km. What is its length on a map with a scale 1:5,000,000?

Greeley [361]

Answer:

The length of the river on a map is $9.6\ cm$