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Vadim26 [7]
3 years ago
9

Three times the sum of a number and 15 is 24

Mathematics
2 answers:
allsm [11]3 years ago
7 0

Answer:

\huge\boxed{\sf x = -7}

Step-by-step explanation:

<em>Let the number be x </em>

So,

=> The sum of number and 15 is x + 15

=> Three times will be 3(x+15)

<u>Given that</u> it equals 24

<u>So, the given condition is:</u>

3(x+15) = 24

<em>Resolving Parenthesis</em>

3x + 45 = 24

<em>Subtracting 45 to both sides</em>

3x = 24 - 45

3x = -21

<em>Dividing both sides by 3</em>

x = -7

kkurt [141]3 years ago
3 0
The answer is -7 since your multiplying 3x the sum
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The number of males in the classroom is three more than twice the number of females. Of the total number of students is 57, how
dolphi86 [110]

Answer:

Step-by-step explanation:

Given that the number of males in the classroom is three more than twice the number of females.

the total number of students is 57

Let x be the no of males then no of females = 57-x

Also we have 3 more than twice no of females as

2(57-x)+3

This equals x

2(57-x)+3=x\\114-2x+3=x\\3x=117\\x=39

No of males = 39, no of females = 18

6 0
3 years ago
What is the length of AC
meriva
Hi!
This is a fun one, as it delves into basic trigonometry.

We're going to use the Pythagorean theorem here, which says that for right triangles where "c" is the hypotenuse,

a² + b² = c²

We have to split this large triangle into two parts, both of which are right triangles. (This is why they drew a line in the middle to tell you that the larger triangle is composed of two right triangles.)

Let's do the one on the right first.

We know that the length of the hypotenuse is 10, and that the length of one of the legs is 6.5. If we plug this into our equation, we'll get the length of the other leg. I'm choosing "b" to be 6.5, but it really doesn't matter if you pick "a" or "b", so long as you reserve "c" for the hypotenuse (longest side).

a² + 6.5² = 10²
a² + 42.25 = 100
a² = 57.75
√a² = √57.75
a ≈ 7.6

Therefore, the length of DC is about 7.6.

Find the length of AD using the same method (7.5 is the hypotenuse "c", and 6.5 is one of the legs "a" or "b"). Then, once you have AD, add the lengths of AD and DC to get AC.

Have a great one!
7 0
3 years ago
I need help with number 2 please.
zalisa [80]
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Answer:

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Step-by-step explanation:

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3 years ago
What is the next term of the arithmetic sequence 1, -2, -5, -8, ...
Vaselesa [24]

Answer:

-11

Step-by-step explanation:

Subtract 3 everytime

3 0
3 years ago
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