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3 years ago

How to solve question one ?

Mathematics

1 answer:

viva [34]3 years ago

6 0

-30-5x=-4x-6(5+4x)

First, you need to use the distributive property on the right to get -30-5x=-4x-30-24x

Then, you can add like terms to get -30-5x=-30-28x

Then, you can add 30 to both sides and add 5x to both sides to get 0=-23x

Finally, you divide both sides by -23 to get 0=x

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

mario62 [17]

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 :)

7 0

3 years ago

While visiting a memorial, a person approximated the angle of elevation to the top of the memorial to be 35º. After walking 255

Alenkasestr [34]

Draw a diagram to illustrate the problem as shown in the figure below.

Let h the height of the hill. =

At position A, the angle of elevation is 40°, and the horizontal distance to the foot of the hill is x.

By definition,

tan(40°) = h/x h = x tan40 = 0.8391x

(1)

At position B, Joe is (x - 450) ft from the foot of the hill. His angle of elevation is

40 + 18 = 58°.

By definition, tan(58°) = h/(x - 450)

h = (x - 450) tan(58°) = 1.6003(x-450)

h = 1.6003x - 720.135 (2)

Equate (1) and (2).

1.6003x - 720.135 = 0.8391x 0.7612x = 720.135

x = 946.0523

From (1), obtain

h = 0.8391*946.0523 = 793.8 ft

Answer: The height of the hill is approximately 794 ft (nearest integer)

6 0

3 years ago

I need help in my math homework

IRINA_888 [86]

All you do is subtract the two numbers

4 0

3 years ago

Please please help I will give you alot of POINTS THIS IS A TRUE and FALSE SO HELP ME ASAP PLEASE THIS IS DUE IN LESS than a hou

adelina 88 [10]

Answer:

false

Step-by-step explanation:

cuz

3 0

3 years ago

Read 2 more answers

Algebra problem below.

umka21 [38]

$A= \frac{1}{2}bh= \frac{1}{2}*18*11=9*11=99 \ ft^2$

3 0

3 years ago