Rhian sat a Maths test and an English test. In the Maths test she scored 14/17. In the English test she scored 31/39

Answers

Answer 1

Answer: MATH- 14x100/17= 82.3%
LA- 31x100/39 = 79%

82.3%>79%
She did better in the math class.

Answer 2

Answer: what is the question?

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Simplify the expression using the variable replacements.
2a² – 4bifa= 2andb = 1

Answers

Answer:

= 4

Step-by-step explanation:

2a^2-4b

=2(2)^2-4(1)

=2×4-4

= 8-4

Jesse collected 42 football cards and 28 basketball cards simpfly the ratio of baseball cards to football cards in his collection

Answers

The ratio of basketball card to football cards is 2 : 3.

What is the ratio?

A ratio indicates how many times one number contains another. If a and b are to objects then ratio of a to the b is given as a : b.

Now it is given that,

Number of football cards = 42

Number of basketball cards = 28

Hence,

Ratio of basketball cards to football cards = Number of basketball cards/Number of football cards

⇒Ratio of basketball cards to football cards = 28/42

⇒Ratio of basketball cards to football cards = 2/3

⇒Ratio of basketball cards to football cards = 2:3

Therefore,The ratio of basketball card to football cards is 2 : 3.

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Baseball cards : Football cards = 28 : 42

28 : 42

7 into 28 is 4 and 7 into 42 is 6

28 : 42 = 4 : 6

2 into 4 is 2 and 2 into 6 is 3

28 : 42 = 4 : 6 = 2 : 3

So the simplified ratio of baseball cards to football cards is 2 : 3.

I hope this helps.

In march, a customer spent $8.55 at an office-supply store for some 12-packs of pens. At that time, the store was selling packages of one dozen pens for $1.35. Any customer who bought more than 4 packages, received a discount of $0.30 on the price of each package in excess of 4 packages. In september, the same customer went back to the store to buy the same number of pens. By then, the price per 12-pack of pens had been raised to $1.50 each, with the same discount for more than 4 packages. How much more did the customer have to pay in September than in March?

Answers

We can start by making an equation from the information given on the month of March to find how many packs he bought.
$4(1.35)+x(1.05)=8.55$ This equation shows that for the first 4 packs he bought, he payed $1.35. Then, consequently, for each pack after that, he payed $0.30 less, and we don't know how many more he bought, so we set it up as shown. Finally, we set it all equal to $8.55 since that's how much he payed that month. We get that x=3, meaning that he bought a total of 7 packs of pens that month.
Knowing this, we can now make an equation for the month of September.
$4(1.50)+3(1.20)=x$ This time, we know the entire left side, that he paid $1.50 for the first 4 packs and $0.30 less for the last 3. We get x=$9.60
Knowing this, we can subtract the amount he paid in September by the amount he paid in March to get the answer... $9.60-$8.55=$1.05

I hope this helped!

Choose the correct simplification of the expression (x2y)2. x4y3
x6y6
x4y2
xy4

Answers

Answer: The correct option is (C) $x^4y^2.$

Step-by-step explanation: We are given to select the correct expression that is equivalent to the expression below:

$E=(x^2y)^2.$

We will be using the following properties of exponents:

$(i)~(a^b)^c=a^(b* c),\n\n(ii)~(ab)^c=a^cb^c.$

We have

$E=(x^2y)^2=(x^2)^2y^2=x^(2* 2)y^2=x^4y^2.$

Therefore, the required equivalent expression is $x^4y^2.$

Thus, (C) is the correct option.

The correct simplification of the expression $(x^2y)^2$ is $x^4y^2$ .

Option C. is correct.

Here, we have,

To simplify the expression, we apply the power of a power rule,

which states that $(a^m)^n = a^{m*n$ .

In this case, $x^2y$ raised to the power of 2 can be simplified as follows:

$(x^2y)^2 = x^{2^(2) * y^(2)$

$=x^4y^2$

Therefore, the correct simplification of $(x^2y)^2$ is $x^4y^2$ .

Option C. is correct.

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The time, in seconds, that it takes a pendulum to swing back and forth is modeled by the equation below. f (l) = 2 pi StartRoot StartFraction l Over 32 EndFraction EndRoot, where l is the length of the pendulum in feet What is the approximate length of a pendulum that takes 2.4 pi seconds to swing back and forth?

Answers

Answer:

46.08 feet.

Step-by-step explanation:

Given that, for length, $l$ feet, the time period, $f(l)$ , of the pendulum is

$f(l)=2\pi\sqrt{(l)/(32)}$ .

As the time period equals the time taken by the pendulum in one back and forth motion, so, actually, the given $2.4\pi$ seconds to swing back and forth is the time period.

Let $l_0$ feet be the length of the pendulum for the time period $2.4\pi$ seconds, so

$f(l_0)=2.4\pi$

$\Rightarrow 2\pi\sqrt{(l_0)/(32)}=2.4\pi$

$\Rightarrow \sqrt{(l_))/(32)}=1.2$

$\Rightarrow (l_0)/(32)=(1.2)^2$ [squaring on both the sides]

$\Rightarrow l_0=1.44*32$

$\Rightarrow l_0=46.08$

Hence, the approximate length of a pendulum that takes $2.4 \pi$ seconds to swing back and forth is 46.08 feet.

Answer:

the answer is d on edge 2020

Step-by-step explanation:

20 is what % greater than 5

Answers

find how much greater 20 is than 5
20-5=15
the % is of 5, so the percent is percent out of 5

20 is x% of 5 greater than 5
20=(x%)5+5
minus 5 both sides
15=(x%)5
divide both sides by 5
3=x%
percent means parts out of 100
x%=x/100
3=x/100
times 100 both sides
300=x

answer is 300%

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