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3 years ago

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On a social studies test, James scored a 2025, Jules earned an 81%, and Scott scored a 0.815. Who earned the highest grade? Just

ify your reasoning by showing your work or explaining.

1 answer:

vlabodo [156]3 years ago

4 0

Answer:

scott earned higher that jules because 81% is 0.81, but the 2025 makes no sense because it does not show a total.

Step-by-step explanation:

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Ginny's piggybank contained $8.80 in quarters, dimes, and nickels. there were two more than five times as many nickels as quarte

SSSSS [86.1K]

Answer:

There are 13 quarters, 67 nickels, and 22 dimes.

Step-by-step explanation:

The value of a quarter is $0.25, the value of dime is $0.10, and the value of a nickel is $0.05. Let there be q quarters, n nickels, and d dimes.

Let's write equations from the statements given:

<u>"Ginny's piggybank contained $8.80 in quarters, dimes, and nickels.":</u>

$0.25q+0.1d+0.05n=8.80$

<u>"there were two more than five times as many nickels as quarters":</u>

$5q+2=n$

<u>"4 less than twice as many dimes as quarters":</u>

<u> $2q-4=d$ </u>

Plugging in equation 2 and 3 into equation 1, we can solve for q:

$0.25q+0.1(2q-4)+0.05(5q+2)=8.80\\0.25q+0.2q-0.4+0.25q+0.1=8.80\\0.7q=8.80+0.4-0.1\\0.7q=9.1\\q=\frac{9.1}{0.7}=13$

<em>Substituting q = 13 into equation 2 will give us nickels:</em>

$n=5q+2\\n=5(13)+2\\n=67$

<em>Substituting q = 13 into equation 3 will give us dimes:</em>

$d=2q-4\\d=2(13)-4\\d=22$

There are 13 quarters, 67 nickels, and 22 dimes.

4 0

3 years ago

PLEASE HELP ME!

strojnjashka [21]

Answer:

<h2>A. a^14 divided by -4</h2>

Step-by-step explanation:

$(-4a^2)(2a^{-3})^{-4}\qquad\text{use}\ (xy)^n=x^ny^n\ \text{and}\ (x^n)^m=x^{nm}\\\\=(-4a^2)\bigg(2^{-4}a^{(-3)(-4)}\bigg)\qquad\text{use}\ 4=2^2\\\\=(-2^2a^2)(2^{-4}a^{12})\\\\=-(2^2)(2^{-4})(a^2a^{12})\qquad\text{use}\ x^nx^m=x^{n+m}\\\\=-2^{2+(-4)}a^{2+12}\\\\=-2^{-2}a^{14}\qquad\text{use}\ x^{-n}=\dfrac{1}{x^n}\\\\=-\dfrac{1}{2^2}a^{14}\\\\=-\dfrac{a^{14}}{4}$

3 0

4 years ago

What is the volume of the composite figure?<br> 12in<br> 4 in<br> 3 in.<br> 7 in.

Minchanka [31]

Answer:

Step-by-step explanation:

$V_p = b \cdot h \cdot w$ , where b, h, w are base, height and width respectively.

$V_{sp} = \frac{1}{3} \cdot {A_b} \cdot h$ , where h is the height, and A_b is the area of the base.

First let's calculate the volume of the paralelipiped by the first formula.

$V_p = 7 \cdot 4 \cdot 3 = 84 in^2$

Then let's find out the height of the pyramid, which is 12 - 4 = 8 in.(See drawing)

Then the area of the base of the square pyramid is simply.

$A_r = 3 \cdot 7 = 21 in^2$

Now we can find the volume of the pyramid.

$V_{sp} = \frac{1}{3} \cdot 21 \cdot 8 = 56 in^3$

To find the total volume, let's add both volumes.

$V_T = 84 + 56 = 140 in^3$

5 0

3 years ago

Please help me with this question

oksano4ka [1.4K]

2 mi
The bigger triangle is 3 times larger than the smaller one
I’m pretty sure it’s this

7 0

3 years ago

I WILL ONLY GIVE BRAINLIEST IF YOU SHOW YOUR WORK

timurjin [86]

Answer:

Books due to this week=1260

Step-by-step explanation:

F-books checked out=12500*(2/5)=5000

nonF-books checked out=19000*(2/5)=7600

Total checked books=5000+7600=12600

Books due to this week = (1/10)*12600=<u>1260</u>

7 0

3 years ago