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yan [13]
3 years ago
6

If each letter represents a different nonzero digit,what must Y be?

Mathematics
1 answer:
Mrac [35]3 years ago
5 0

Answer:

D

Step-by-step explanation:

With only 4 options, I substituted the possible numbers for Y. When substituting Y for 8, the right hand column wrote:

8 - Z = 4

Another way to think of this is 8 - 4 = 4.

When using 8, Z must equal 4.

Take this information to the left hand column.

8 - Z = Z

We know Z equals 4 so plug this information in. Is it correct?

8 - 4 = 4

This is correct.

Therefore, the answer is 8, or D.

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What is the area of the circle? With a 5cm radius.
larisa [96]
Hi there!

The formula for the area of a circle is A = pi x r^2. Using this formula, we can plug in the radius and solve for the area.

WORK:
A = pi x (5)^2
A = pi x 25
A = 25pi cm^2

ANSWER:
B - 25pi cm^2

Hope this helps!! :)
If there's anything else that I can help you with, please let me know!
7 0
4 years ago
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Find the Relative Change in the values of the function f(x) = x3 + 2 between x = 1 and x = 2.5 Enter your answer accurate to thr
ehidna [41]

Answer:

9.750

Step-by-step explanation:

formula for average rate of change is ;

f(b)- f(a)/b- a

here a = 1 and b = 2.5

f(b) = (2.5)^3 + 2 = 17.625

f(a) = 1^3+ 2 = 3

using the formula above, we have it that

(17.625-3)/2.5-1 = 9.750

4 0
3 years ago
2019 Chapter Sprint Round, #20
nadezda [96]

Answer:

Speed\ of\ car=38\ km/h

Step-by-step explanation:

Distance Covered by Horse:

Speed\ of\ horse=50\ km\h=50\times \frac{1000}{60}\ meter/ minute\\\\Speed\ of\ horse=\frac{2500}{3}\ meter/minute\\\\Distance\ covered\ in\ 4\ minutes=speed\times time=\frac{2500}{3}\times 4\\\\Distance\ covered\ in\ 4\ minutes=\frac{10000}{3}\ meters\\\\

Distance covered by Car:

Let\ speed\ of\ car=x\ meter/minute\\\\time=4\ minutes\\\\Distance\ covered=speed\times time=4\times x=4x

Distance\ covered\ by\ horse=Distance\ covered\ by\ car+800\\\\\frac{10000}{3}=4x+800\\\\4x=\frac{10000}{3}-800\\\\4x=\frac{7600}{3}\\\\x=\frac{7600}{3\times 4}\ meter/minute\\\\x=\frac{7600}{3\times 4}\times \frac{60}{1000}\ km/h\\\\x=38\ km/h

7 0
3 years ago
3x^3-5x^2-5x-1=0<br>Zero of polynomials​
Oliga [24]

Answer:

Step-by-step explanation:

Wuh

5 0
3 years ago
Help please!!! 10 points!!!
padilas [110]
<h3>17) 5ft</h3>

In order to do this problem you must use square roots. Basically the same number multiplied twice to get your answer. In this problem, 5 * 5 = 25.

<h3>18) 10m</h3>

Since they are asking for the square root to the nearest whole unit, we must know that the √105 lies in between 10 and 11, since 10 * 10 = 100 and 11 * 11 = 121. 105 is closer to 100 than it is to 121 and therefore the answer is 10.

Don't forget your labels!!! (Feet and meters)

8 0
4 years ago
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