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3 years ago

For brainiest :):):):):):)):):):)

Mathematics

1 answer:

zmey [24]3 years ago

8 0

Answer:

9) 0.46

10) 0.666

11) 18%

12) 2.3%

13) 0.7/ 70%

14) 0.56/ 56%

15) 0.0035/ 0.35%

16) 1.13/113%

Step-by-step explanation:

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Martina combined different amounts of water, vinegar, and rubbing alcohol to make 38 milliliters (ml) of a solution for a scienc

Dominik [7]

That in the first one is 30 and in the 2d one is 8 minus (less) than the first one

4 0

4 years ago

Read 2 more answers

Four brothers have ages which are consecutive even integers. If the product of the ages of the two middle brothers is 528, how o

exis [7]

Answer:

The oldest brother is of age $26$ years.

Step-by-step explanation:

As the age of four brothers are consecutive even integers.

We assume that the ages are $x,(x+2),(x+4),(x+6)$ as their respective ages.

And the age of the youngest brother $x$ yrs.

Age of the oldest brother $(x+6)$ yrs.

According to the question

Product of two middle brother that is $(x+2)(x+4) =528$

So we will arrange this in our equation and solve the quadratic.

$(x+2)(x+4) =528$

$x^{2}+4(x)+2(x)+8 =528$

$x^{2}+4(x)+2(x)+8-528=0$

$x^{2}+6(x)-520=0$

Solving the quadratic by using middle term splitting or directly with quadratic formula we can find the value of 'x' .

Here it is solved with quadratic formula:

Comparing with standard equation $ax^{2}+b(x)+c=0$ ,here $a=1,b=6\ and\ c=-520$ .

$x= \frac{-b \pm \sqrt{b^2-4ac} }{2a} = \frac{-6 \pm \sqrt{6^2-4\times \ (-520)} }{2\times 1}$

$x=20,-26$

We will work with the positive value of (x) so the the age of the youngest brother $=(x)=20$ yrs.

And the age of the the oldest brother $=(x+6)=(20+6)=26$ years.

The age difference is of $(26-20)=6$ years.

4 0

4 years ago

You receive 15% of a profit from a car wash how many money do you receive from a profit $600?

PilotLPTM [1.2K]

EXPLANATION

If receive 15% of a profit, and considering a total profit of $600, the amount is given by the expression:

Profit = 15% of 600

We must turn 15% into a decimal form by dividing it by 100 as follows:

15/100 = 0.15

So, the computed value is:

Profit = 0.15 x 600 = $90

The answer is $90.

3 0

1 year ago

The table shows the weight gain of a kitten over a

stepan [7]

Answer:

The rate of change of the weight of kitten A is greater than the rate of change of the weight of kitten B

Step-by-step explanation:

The rate of change of the linear relationship is the slope of the line which represent this relationship

The rule of the slope is m = $\frac{y2-y1}{x2-x1}$ , where (x1, y1) and (x2, y2) are 2 points on the line

∵ The table shows the weight gain of kitten A

→ Choose two points from the table to find the slope

∵ Points (0, 3) and (1, 7) are two points in the table

∴ x1 = 0 and y1 = 3

∴ x2 = 1 and y2 = 7

→ Substitute them in the rule of the slope above

∵ m = $\frac{7-3}{1-0}$ = $\frac{4}{1}$ = 4

∵ The slope is the rate of change

∴ The rate of change of the weight of kitten A is 4 oz/week

∵ The graph shows the weight gain of kitten B

→ Choose two points on the line to find the slope

∵ Points (0, 4) and (2, 10) lies on the line

∴ x1 = 0 and y1 = 4

∴ x2 = 2 and y2 = 10

→ Substitute them in the rule of the slope above

∵ m = $\frac{10-4}{2-0}$ = $\frac{6}{2}$ = 3

∵ The slope is the rate of change

∴ The rate of change of the weight of kitten B is 3 oz/week

→ By comparing the two rates

∵ The rate of change of kitten A is 4 oz per week

∵ The rate of change of kitten B is 3 oz per week

∴ The rate of change of the weight of kitten A is greater than

the rate of change of the weight of kitten B

7 0

3 years ago

2x+4 what is the value for x

Greeley [361]

Answer:

x = -2

Step-by-step explanation:

2x + 4 = 0

2x = -4

2x/2 = -4/2

x = -2

3 0

3 years ago