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kakasveta [241]

3 years ago

15

I need help atleast an equation to get started please

1 answer:

aliina [53]3 years ago

4 0

Let x = 50% and y = 13%

We need 5 liters of 27.8% acid.
A) x + y = 5
B) .50x + .13y = (.278 * 5)
We multiply A by -.5
A) -.5 x + -.5 y = -2.5 then we add it to B
B) .50x + .13y = (<span>1.39 </span>)
-.37y = -1.11
y = 3
x = 2
So, we need 2 liters of 50% and 3 liters of 13%.

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Write an equation of the line in slope intercept form.

Lesechka [4]

Answer:

D. Y= -5/3x

Step-by-step explanation:

The starting point of the equation is (0,0), therefore no value is being added to it, to find the slope you just have to do rise over run, since the line is going down from left to right, the slope has to be negative. Hope this helped

8 0

2 years ago

Solve for x PLS HELP NOW

Zepler [3.9K]

Answer:

$x=70$

General Formulas and Concepts:

<u>Pre-Alg</u>

Order of Operations: BPEMDAS
Equality Properties

Step-by-step explanation:

<u>Step 1: Define equation</u>

<u /> $\frac{0.35}{\frac{2}{3}x } =\frac{0.45}{x-10}$ <u />

<u />

<u>Step 2: Solve for </u><em><u>x</u></em>

Cross-multiply: $0.35(x-10)=\frac{2}{3} x \cdot 0.45$
Distribute 0.35: $0.35x - 3.5=\frac{2}{3} x \cdot 0.45$
Multiply: $0.35x - 3.5=0.3x$
Isolate <em>x</em> term: $-3.5=-0.05x$
Isolate <em>x</em>: $70=x$
Rewrite: $x=70$

<u>Step 3: Check</u>

<em>Plug in x to verify it's a solution.</em>

Substitute: $\frac{0.35}{\frac{2}{3}(70) } =\frac{0.45}{70-10}$
Multiply: $\frac{0.35}{\frac{140}{3} } =\frac{0.45}{70-10}$
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7 0

2 years ago

Read 2 more answers

Mandarinka [93]

Answer:

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Step-by-step explanation:

6 0

3 years ago

Jessica brought a cooler to the family picnic filled with 32 cans of regular soda and 18 cans of diet soda. What is the ratio of

natta225 [31]

Answer:

ratio of regular to diet soda = 16/9

Step-by-step explanation:

Jessica brought a cooler to the family picnic filled with 32 cans of regular soda and 18 cans of diet soda. This means

Number of cans of regular soda = 32

Number of cans of diet soda = 18

Total number of soda brought to the family picnic = number of cans of regular soda + number of cans of diet soda

= 32 + 18= 50

the ratio of regular soda cans to diet cans in the cooler= 32/18

Divide numerator and demo minator by 2, we have 16/9.

The fraction cannot be reduced further. So ration of regular to diet soda = 16/9

8 0

2 years ago

Y is directly proportional to x2.<br> If y = 112 when x = 4 find<br> y when x = 9<br> y=

elena-s [515]

Answer:

112-4

y-9

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4y=1008

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y=252

have a nice day .

hope this helps

7 0

2 years ago