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3 years ago

Write two expressions where the solution is 19.

Mathematics

2 answers:

sergij07 [2.7K]3 years ago

7 0

S-1=18
x/10=1.9
these have solution 19

liberstina [14]3 years ago

7 0

Answer:10+9=19. 75÷3=19

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If DE=4x+10, EF =2x-1, and DF=9x-15, find DF

svetoff [14.1K]

Answer:

Step-by-step explanation:

If DE = 4x+10,EF =2X -1, and DF= 9x - 15 find DF

(de + ef ) - df = 2e || 2e/2 = e || ed - e = d || ef - e = f || f + d = df

de + ef = 6x + 11 || (6x +11) - df = -3x -6 || 2e/2 = -3x/2 - 3 || (-3x/2 - 3) - de = x/2 + 7|| (- 3x/2 - 3) - ef = -x/2 - 1|| d + f = 6

7 0

3 years ago

Read 2 more answers

A) 2.5x + 1.25 < 3.75 <br>b)5.12 2.4x + 0.3<br>help!!!<br><br>

Sauron [17]

Answer:

a) 1

b)I would like to help u but i don't understand the question I think something is missing there plus sign or minus sign sry

Step-by-step explanation:

2.5x + 1.25 < 3.75

2.5x < 3.75 - 1.25

2.5x < 2.5

$\frac{2.5x}{2.5} = \frac{2.5}{2.5}$

x = 1

I hope u like it ‍❤️‍‍❤️‍

For any question comment me

Really sorry for the second question

4 0

3 years ago

The science fair judges will be science and volunteers each judge will only have time to view 5 projects there are 133 science t

antiseptic1488 [7]

5 times amount of people has to be bigger than 2112

5(133+v)≥2112
distribute
665+5v≥2112
minus 665 from both sides
5v≥1447
divide both sides by 5
v≥289.4
yo can't have 0.4 volunterer
v≥290

has to have at least 290 volunteers

8 0

3 years ago

What is the mass of an object that has a density of 5.25 g and a volume of 10 cm³

Shalnov [3]

The mass of the object would be 52.5g

3 0

3 years ago

The height of a triangular window is 3 feet less than its base. The area the window is 20 ft.? find the dimensions of the window

Ivenika [448]

Let us assume base of the window = b feet.

Height is 3 feet less than base, that is = (b-3).

Given area of the triangle = 20 feet square.

We know formula for area of a triangle:

Area = $\frac{1}{2}$ × Base × Height

Plugging values in formula, we get

20 = $\frac{1}{2} b \times (b-3)$

$\mathrm{Multiply\:both\:sides\:by\:}2$

$40=b\left(b-3\right)$

$40=b^2-3b$

$b^2-3b-40=0$

Factoring quadratic, we get

$\left(b+5\right)\left(b-8\right)$ =0

b+5=0

b=-5

b-8=0

b=8.

For base we can take only positive value.

<h3>Therefore, base of the triangle = 8 feet and height = 8 -3 = 5 feet.</h3>

6 0

3 years ago