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crimeas [40]
3 years ago
5

Timed!!! few mins left HELP!

Mathematics
1 answer:
LUCKY_DIMON [66]3 years ago
7 0

Answer:

2x - 15

3a + 17

1000/y

Step-by-step explanation:

1.

15 less means subtract 15

twice a number is 2x

Answer: 2x - 15

2.

increased by 17 means add 17

3 times a number is 3a

Answer: 3a + 17

3.

1000 divided by y number of employees

Answer: 1000/y

You might be interested in
7. In triangle ABC, side AB is 2 cm shorter than side
Mamont248 [21]

Answer:

AC = 21, AB = 19, and BC = 22

Step-by-step explanation:

If x is the length of AC, then:

AB = x − 2

BC = x + 1

The perimeter is the sum of all three sides:

62 = x + x − 2 + x + 1

62 = 3x − 1

63 = 3x

x = 21

Therefore:

AC = 21, AB = 19, and BC = 22

3 0
3 years ago
How I do this?<br> 3x+4y=11<br> X-2y=-3
Amanda [17]

Answer:

\huge\boxed{x=1,\ y=2\to(1,\ 2)}

Step-by-step explanation:

\left\{\begin{array}{ccc}3x+4y=11\\x-2y=-3&\text{multiply both sides by (-3)}\end{array}\right\\\\\underline{+\left\{\begin{array}{ccc}3x+4y=11\\-3x+6y=9\end{array}\right}\qquad\text{add both sides of the equations}\\.\qquad\ \ \ \ 10y=20\qquad\text{divide both sides by 10}\\.\qquad\qquad\boxed{y=2}\\\\\text{subtitute it to the second equation:}\\x-2(2)=-3\\x-4=-3\qquad\text{add 4 to both sides}\\\boxed{x=1}

5 0
3 years ago
Given to
zheka24 [161]

Answer:

Step-by-step explanation:

Given:

\frac{AD}{DC}=\frac{BE}{EC}

To Prove:

AB║DE

Solution:

Since, corresponding sides of ΔACB and ΔDCE are proportional,

\frac{AD}{DC}=\frac{BE}{EC}

Both the triangles will be similar.

ΔACB ~ ΔDCE [By SAS property of similarity]

Therefore, ∠1 ≅ 2 [CPCTC]

Since, ∠1 and ∠2 are the corresponding angles

Therefore, AB║DE [Converse of corresponding angles theorem]

7 0
3 years ago
If you multiply this number by 3 , then subtract 15 , the result is 51. What is the number?
bagirrra123 [75]
3x-15=51 3x=36 X= 12 Thus the number is 12
8 0
3 years ago
Dana loves rocks! She has 666 pieces of granite, 333 pieces of marble, 141414 pieces of sandstone, and 111 piece of slate. What
Lilit [14]

Answer: 14:3

Step-by-step explanation:

<h3> The exercise is:</h3><h3> "Dana loves rocks! She has 6 pieces of granite, 3 pieces of marble, 14 pieces of sandstone, and 1 piece of slate. What is the ratio of pieces of sandstone to pieces of marble in Dana's collection?"</h3><h3></h3><h3> </h3>

You can use ratio to compare values.

By definition, ratios can be written in the following form:

a:b

In this case, you know that the number of  pieces of different rocks that Diana has in her collections, are:

granite=6\ pieces\\\\marble=3\ pieces\\\\sandstone=14\ pieces\\\\slate=1\ piece

Since you must compare the number of pieces of sandstone and the number of pieces of marble in Dana's collection, you need to write the following ratio:

sandstone:marble\\\\14:3

5 0
3 years ago
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