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erica [24]
3 years ago
8

a chemical comapany makes two brands of antifreeze . the first brand is 70% pure antifreeze and the second is 95% pure antifreez

e. In order to obtain 30 gallons of a mixture that contains 80% pure antifreeze how many gallons of each brand pf antifreeze must be uses
Mathematics
1 answer:
laiz [17]2 years ago
3 0

Answer:hello mate

Step-by-step expla

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Took a photo to use ​
ruslelena [56]

Answer:

x=9

<A=23

<B= 69

Step-by-step explanation:

1. 2x+5+3(2x+5)=92     2. 2x+5+6x+15=92     3. 8x+20=92     4. 8x=72     5. x=9

<A= 2(9)+5=18+5=23

<B= 3(2(9)+5)=3(23)=69

5 0
2 years ago
Help please............................
Vesnalui [34]

Step-by-step explanation:

csc x / (cot x + tan x)

Write in terms of sine and cosine.

(1 / sin x) / [(cos x / sin x) + (sin x / cos x)]

Multiply top and bottom by sin x.

1 / [cos x + (sin²x / cos x)]

Multiply top and bottom by cos x.

cos x / (cos²x + sin²x)

Use Pythagorean identity.

cos x / 1

cos x

3 0
3 years ago
Which number line represents the solution to the inequality x - 3 &gt; 2
Ivahew [28]

Answer: x > 5

Step-by-step explanation: To solve for <em>x</em> in this inequality, our goal is the same as it would be if this were an equation, to get x by itself on one side.

Since 3 is being subtracted from x, we add 3 to

both sides of the inequality to get x > 5.

When graphing x > 5, we have an open circle on 5 and the

open circle tells us that 5 is not part of our answer.

Then we draw an arrow going to the right to represent

all possible solutions to this inequality, any number greater than 5.

6 0
3 years ago
By definition, an expression does not contain
yarga [219]
By definition, an expression does not contain AN EQUALS SIGN (=).
3 0
2 years ago
If N collected 4/20lb of cloth and Z collected 7/8lb of cloth.
love history [14]
First you need to give both fractions a common denominator lets say 40. So N would be 8/40 and Z would be 35/40, so Z collected more than N. All together they collected 43/40 which simplifies to be 1 and 2/40 which would again simplify to 1 and 1/20.
8 0
3 years ago
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