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3 years ago

9

ERICA WROTE 5 added to y as 5+y and 5 subtracted from y as 5-y.why is the expression correct but the second one incorrect? when

is order important in writing an expression?
please help me.....

1 answer:

Lemur [1.5K]3 years ago

3 0

Answer:

Step-by-step explanation:

Order is impotant since you could easily make a positve number negative and vice versa. You switch the order of 5 subtracted by y to y-5.

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Jerryâ€™s loan had a principal of $22,000. He made quarterly payments of $640 for nine years until the loan was paid in full. Ho

vredina [299]

The amount Jerry paid in interest is $1,040.

Given to us,

Jerry's principal amount = $ 22,000,

quarterly payment for each quarter = $ 640

Total time for which Jerry paid each quarter = 9 years

As We know that in a year there are 4 quarters,

so, $\rm 1\ year = 4\ quarters$ ,

$\rm 9\ year = 9\times 4\ quarters$ ,

9 years = 36 quarters,

The total amount paid by Jerry for nine years in each quarter =

quarterly payment for each quarter x no. of quarters for which amount paid

$\rm Total\ amount\ paid\ by\ Jerry\ for\ nine\ years\ in\ each\ quarter = \$640\times 36 quarters = \$23,040$

Thus, the total amount paid by Jerry for nine years in each quarter is $23,040.

Therefore,

$\rm Amount\ Jerry\ pay\ in\ interest = Amount\ Jerry\ paid- Principal\ amount$ ,

$\rm Amount\ Jerry\ pay\ in\ interest = \$23,040-\$22,000 = \$1040$

Hence, the amount Jerry paid in interest is $1,040.

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2 years ago

How is multiplying two decimals different from multiplying one decimal by a whole number?

Natasha2012 [34]

Answer: The major difference is that after you have finished multiplying all the terms (while ignoring the decimal points), you have to add up how many decimal places there are in the factors, and put that many decimal places in the answer.

Step-by-step explanation:

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3 years ago

5) Assume this is an acceleration graph, where the X axis represents time in seconds and the Y axis represent velocity in m/s. W

Stels [109]

Answer:

D) Acceleration is positive and increasing.

Step-by-step explanation:

In formulae, acceleration is defined as the rate of change of velocity per unit time; for example:

$a=\frac{v}{t}$

where Δ V is the variation of velocity and Δ T is the variation in time.

The graph depicts the velocity of a moving item as a function of time. As we can see ΔV is the increment on the y-axis, while ΔT is the increment on the x axis: therefore, the ratio ΔV/ΔT is the curve's slope. In fact, the slope of the curve in a velocity-time graph corresponds to the object's acceleration. In this graph, we can see that the slope of the curve is growing, which means that the acceleration is positive (since the slope is positive and the velocity is increasing) and increasing (because the slope is increasing).

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2 years ago

Some people use a rule to see how many hours a child should sleep at night. Subtract the child's age in years from 30, then divi

m_a_m_a [10]

It would be 8 hours. 30-14=16. 16/2=8.

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2 years ago

The sum of the areas of two circles is 80 pie square meters. Find the length of a radius of each circle if one of them is twice

Svetach [21]

Answer:

The radius of the circles are $4\ m$ and $8\ m$

Step-by-step explanation:

Let

x-----> the radius of larger circle

y----> the radius of smaller circle

we know that

$\pi x^{2} +\pi y^{2}=80\pi$

$x^{2} +y^{2}=80$ -----> equation A

Remember that

$x=2y$ -----> equation B

substitute equation B in equation A and solve for y

$(2y)^{2} +y^{2}=80$

$4y^{2} +y^{2}=80$

$5y^{2}=80$

$y^{2}=16$

$y=4\ m$

Find the value of x

$x=2y$

$x=2(4)=8\ m$

therefore

The radius of the circles are $4\ m$ and $8\ m$

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3 years ago