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3 years ago

I give yall brainliest

Mathematics

1 answer:

Lady bird [3.3K]3 years ago

8 0

Answer:

1 ) 7

2 ) 4

3 ) it is always zero !!

Step-by-step explanation:

number 1 is easy !! its always the positive value of whatever number is inside the brackets.

number two, since the signs are both negative, you just divide it normally !! so thats 4 !

and the last one is just a simple rule, where it is always zero.

i hope this helps !

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I need number 2 I need help fast

Semmy [17]

Answer:

B. 70

Step-by-step explanation:

<h3><u>look at the smaller triangle</u></h3>

its dimensions are :

45 , 35 , 24

<h3><u>look at the bigger triangle ( this includes the dimensions of the smaller one)</u></h3>

its dimensions are :

45 + 45 , x , 24 + 24

= 90 , x , 48

from the dimensions given we can notice that :

<em>bigger triangle dimensions are = 2 * smaller triangle dimensions</em>

therefore to find the value of x :

x = 35 * 2

<u />

<h3><u>hence the answer is B ) 70 </u></h3>

4 0

3 years ago

(6ƒ² − 9ƒ + 10) − (− 2ƒ² − ƒ+3)

stepan [7]

Answer:

Step-by-step explanation:

6f^2 - 9f + 10 + 2f^2 + f - 3

8f^2 - 8f + 7

5 0

2 years ago

Read 2 more answers

6. Simplify the following a) - 36 12y b) 24a (-3a) c) 2a (-3) - 5ab d) 70y + 10 +34y - 8 7 Simplify

Dmitriy789 [7]

Answer:

a) 432y

b) -72a^2

c) -6a - 5ab

d) 104y-46

Step-by-step explanation:

3 0

3 years ago

The paint mixer wants to mix paint that is 30% gloss with paint that is 15% gloss to make 3.75 gallons of paint that is 20% glos

Kipish [7]

The paint mixer should mix 1.238 gallon paint that is 30 % gloss and 2.512 gallon paint that is 15 % gloss to get 3.75 gallon of paint that is 20 % gloss.

In this question we must determine the correct volumes of each paint to obtain a 20 % gloss with paint by means of weighted averages:

$c_{r} = x\cdot c_{a} +(1-x)\cdot c_{b}$ (1)

Where:

$x$ - Proportion of the paint that is 30 % gloss.
$c_{a}$ - Concentration ratio of the paint that is 30 % gloss.
$c_{b}$ - Concentration ratio of the paint that is 15 % gloss.
$c_{r}$ - Resulting concentration ratio

If we know that $c_{a} = 0.3$ , $c_{b} = 0.15$ and $c_{r} = 0.2$ , then the proportion of the paint that is 30 % gloss is:

$0.2 = 0.3\cdot x +(1-x)\cdot 0.15$

$0.2 = 0.15\cdot x+0.15$

$0.15\cdot x = 0.05$

$x = 0.33$

And the quantity of gallons needed of each paint are:

Paint (30 % gloss)

$V_{a} = 0.33\cdot (3.75\,gal)$

$V_{a} = 1.238\,gal$

Paint (15 % gloss)

$V_{b} = V-V_{a}$

$V_{b} = 3.75\,gal-1.238\,gal$

$V_{b} = 2..512\,gal$

The paint mixer should mix 1.238 gallon paint that is 30 % gloss and 2.512 gallon paint that is 15 % gloss to get 3.75 gallon of paint that is 20 % gloss.

To learn more on weighted averages, we kindly invite to check this question: brainly.com/question/18554478

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3 years ago

Olve the following inequality: 38 < 4x + 3 + 7 – 3x.

Agata [3.3K]

combine like terms: 38 < x + 10

subtract 10 from both sides: 28 < x

x > 28

5 0

3 years ago