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3 years ago

5x + 2(-3x) = * A)-11x B) -x C) -x^2 D) 11x

Mathematics

2 answers:

daser333 [38]3 years ago

8 0

Answer:

B) -x

Step-by-step explanation:

distribute the 2 to -3x to get 5x + (-6x)

combine terms to get -x

Grace [21]3 years ago

8 0

Is -x. B....... .......

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0.43 times 2 <br><br> what is the anwser

erma4kov [3.2K]

Answer:

0.86

Step-by-step explanation:

Its just multiplication

5 0

3 years ago

Read 2 more answers

George was given 11 grams of medicine, but the full dose is supposed to be 25 grams. What percent of his full dose did George re

Bess [88]

Answer: George receive 44 % of his full dose .

Step-by-step explanation:

Given : The amount for full dose : 25 grams

The amount received by George = 11 grams

Now, the percent of his full dose received by George :-

$\dfrac{\text{Dose taken by George}}{\text{Full dose}}\times100$

$=\dfrac{11}{25}\times100=44\%$

Hence, George receive 44 % of his full dose .

8 0

3 years ago

The scatter plot below shows the relationship between the length (x) in meters and mass f(x) in kg of a marine animal

Semmy [17]

Answer:

Option C.

Step-by-step explanation:

As we can see from the graph, we have plotted the different points.

If the line drawn through the scatter plots, shows the relationship between the length x and mass f(x) then the function will be in the form of

f(x) = mx + b

where m = slope of the line that fits the best

b = y-intercept of the line

Since the plotted line passes through two pints (1, 1) and (10, 94).

Then the slope m = $\frac{y-y'}{x-x'}$

m = $\frac{(94-1)}{10-1}$

m = $\frac{93}{9}$

m = 10.3

Now we place the coordinates (1, 1) in the equation to find the value of y-intercept b.

1 = 10.3 + b

b = 1 - 10.3

b = -9.3 ≈ 9

So the function will be f(x) = 10.3x - 9

Option C is the answer.

5 0

3 years ago

An amusement park offers two options. Option 1 involves a $10 admission fee plus $0.50 per ride. Option 2 involves a $6 admissio

Art [367]

Answer:

16 rides

Step-by-step explanation:

Option 1 . Admission fee = $10

Each ride = $0.50

Option 2 . Admission fee = $6

Each ride = $0.75

Let no. of rides be x

So, cost of ride according to option 1 = 0.50x

So, total cost after having x rides according to option 1 :

= 10+0.50x ---1

Cost of ride according to option 2 = 0.75x

So, total cost after having x rides according to option 2 :

= 6+0.75x --2

Now to find the beak even point i.e. having the same cost

Equate 1 and 2

$10+0.50x=6+ 0.75x$

$10-6= 0.75x-0.50x$

$4= 0.25x$

$\frac{4}{0.25} =x$

$16=x$

Thus for 16 rides , the two options have the same cost .

Hence the break even point is 16 rides

5 0

4 years ago

Write down an (in)equality which describes the solid ball of radius 2 centered at (-2, 5, 2). It should have a form like ????2 ?

MissTica

$\text{We know that the euation of the sphere with radius r and centered at (h,k,l)}\\
\text{is given by:}\\
\\
(x-h)^2+(y-k)^2+(z-l)^2=r^2\\
\\
\text{here we have given a solid ball of radius 2 centered at }(-2, 5,2), \text{ so the }\\
\text{region of the ball will be all the area within the ball.}\\
\text{Hence the inequality that will describe the ball is give given by}$

$(x-(-2))^2+(y-5)^2+(z-2)^2\leq 2^2\\
\\
\Rightarrow (x+2)^2+(y-5)^2+(z-2)^2\leq 4\\
\\
\text{hence the required inequality that describes the ball is:}\\
\\
(x+2)^2+(y-5)^2+(z-2)^2-4\leq 0$

6 0

4 years ago