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likoan [24]
2 years ago
9

Find the values of x and y. 40 sy 40 xº X = y= 0

Mathematics
1 answer:
Helga [31]2 years ago
5 0

Answer:

x = 30°

y = 5

Step-by-step explanation:

The ∆ where you find x is an isosceles ∆ because two of its sides has a length of 40 each, since the other triangle has equal angles of 60° each, it also has equal length sides of 40.

Therefore, x is a base triangle of the isosceles, thus:

x = ½(180 - (180 - 60))

x = ½(180 - 120)

x = ½(60)

x = 30°

Let's find y.

8y = 40 (sides of an equilateral ∆ are equal)

Divide both sides by 8

y = 5

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8.25 × 10–4 in standard form.
Elanso [62]

The 10^-4 means that the decimal point is 4 places to the left of where it is in 8.25 (if the exponent was positive the decimal point would be to the right). If you move the decimal point 4 places to the left you get an answer of 0.000825 which is 8.25 * 10^-4 in standard form.

7 0
2 years ago
If Myron receives 10 votes from his class of 25 students what percentage does he receive
Vsevolod [243]

Answer:

Myron received 40% votes.

Step-by-step explanation:

Myron receives 10 votes from his class of 25 students and we have to calculate the percentage of the vote received.

Now we will use unitary method to calculate the percentage.

∵ Out of 25 students Myron received votes of = 10 students

∴ Out of 1 student Myron received votes = 10/25 students

∴ Out of 100 students Myron received votes = 10×100/25 = 40%

Myron received 40% votes.  

6 0
3 years ago
Read 2 more answers
Inqualtites question<br><br>Complete the inequality expression that describes this set of numbers:
RideAnS [48]

Answer:

- 3 ≤ x < 0

Step-by-step explanation:

- 3 is included in the set thus x can equal - 3

- 3 is less than all other values in the set including the largest value of 0, thus

- 3 ≤ x < 0

3 0
3 years ago
Su has 5 times as many marbles as Bertha. When Su gives Bertha 10 marbles, they have the same amount. How many marbles did they
Dafna11 [192]

Answer:

Part A)

The number of marbles that Su has at the beginning is 25

The number of marbles that Bertha has at the beginning is 5

Part B)

The number of marbles that Su has at the end is 15

The number of marbles that Bertha has at the end is 15

Step-by-step explanation:

Let

x------> number of marbles that Su has at the beginning

y------> number of marbles that Bertha has at the beginning

we know that

x=5y ----> equation A

x-10=y+10 ----> equation B

substitute equation A in equation B

(5y)-10=y+10

4y=20

y=5

Find the value of x

x=5(5)=25

Part A) How many marbles did they EACH have at the begining?

The number of marbles that Su has at the beginning is 25

The number of marbles that Bertha has at the beginning is 5

Part B) How many did they EACH have at the end?

x-10=y+10

so

25-10=5+10

15=15

therefore

The number of marbles that Su has at the end is 15

The number of marbles that Bertha has at the end is 15

5 0
3 years ago
Kelvin has 36 coins, all nickels and quarters. The total value of all these coins is $3.80. How
VLD [36.1K]

Answer: 26 nickels

Step-by-step explanation:

6 0
2 years ago
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