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3 years ago

Write the interval {xl-3 < x < 5} as an inequality and using interval notation.

Mathematics

1 answer:

madam [21]3 years ago

8 0

Step-by-step explanation:

$\{x\ |\ -3$

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How many milliliters of 0.30%. sugar solution must you add to 75 mL of 4% sugar solution to get a 0.50% sugar solution? show you

LekaFEV [45]

We have 75 mL of 4% sugar solution.
We have to add a 30% sugar solution to make a 50% sugar solution.
75 * .04 + .30x = .50 * (75 +x)
3 + .30x = 37.5 +.50x
I can't get the equation to solve.
Did you type it correctly? For one thing, you have the percentages typed as .30 % and 4%. Are the decimal places in the correct positions?

Also, no matter how much 30% sugar solution you add, it will NEVER increase to 50%.

6 0

3 years ago

Find the area of the triangle ABC.

DerKrebs [107]

Answer:

Step-by-step explanation:

6*8=24

8 0

2 years ago

So I kinda forgot how to do this *nervous laughter* um help

natali 33 [55]

1) value of x =60

2) value of x = 3

Step-by-step explanation:

We need to use cross products to solve the proportions of x.

$1.\,\, \frac{3}{5}= \frac{x}{100}$

Solving:

$\frac{3}{5}= \frac{x}{100}\\Cross\,\,multiply\,\,:\\5x=3*100\\5x=300\\x=\frac{300}{5}\\x=60$

So, value of x =60

$2.\,\,\frac{x}{8}=\frac{7.5}{20}$

$\frac{x}{8}=\frac{7.5}{20} \\20x=7.5*8\\20x=60\\x=\frac{60}{20}\\ x=3$

So, value of x = 3

Keywords: Ratio and Proportions

Learn more about Ratio and Proportions at:

#learnwithBrainly

7 0

3 years ago

If there are 16 red bobbles for every 2 green dandees, how many red bobbles are there in 20 green dandees?

kvasek [131]

Answer:

160

Step-by-step explanation:

20 / 2 = 10

10 * 16 = 160

8 0

3 years ago

Guys do you know this?

TEA [102]

Answer:

That would be 2/7

Step-by-step explanation:

Using substitution. x^2 +x+1 at 1 is 7

sqrt4 is 2

2/7

6 0

3 years ago