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3 years ago

Please help me! Help is very needed

Mathematics

1 answer:

VMariaS [17]3 years ago

5 0

What do you need help for :)

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You fill a 100 mL graduated cylinder with 38.5 mL of water. What is the volume?

larisa [96]

Answer:

38.5cm³

Step-by-step explanation:

1ml = 1cm³

38.5ml = 38.5cm³

7 0

3 years ago

The point 3/4 of the way from A(-4,- 7) to B(12, 5)

Simora [160]

Answer:

The coordinates of C are (8,2)

Step-by-step explanation:

We are given the segment from A(-4,-7) to B(12,5) and it's required to find a point C(x,y) that is located at 3/4 of the distance from A to B.

This means that:

$d_{AC}=3/4\cdot d_{AB}$

where dAC is the distance from A to C and dAB is the distance from A to B.

The same proportion of the distances is satisfied by the coordinates of the point C, that is:

$\displaystyle x-x_A=\frac{3}{4}(x_B-x_A)$

Adding xA:

$\displaystyle x=\frac{3}{4}(x_B-x_A)+x_A$

$\displaystyle x=\frac{3x_B+x_A}{4}$

Similarily:

$\displaystyle y=\frac{3y_B+y_A}{4}$

Calculating:

$\displaystyle x=\frac{3(12)-4}{4}$

x = 8

$\displaystyle y=\frac{3(5)-7}{4}$

y = 2

The coordinates of C are (8,2)

3 0

3 years ago

Explain how you know that the some of 12.6, 3.1, and 5.4cis greater than 20

ddd [48]

You can add the numbers together so:

12.6
3.1
+ 5.4
 21.1

Since the sum of the numbers is 21.1, it is greater than 20

8 0

3 years ago

Given the function f(x) = −2x2 4x − 7, find f(−4). −55 −7 9 25

dimulka [17.4K]

$f(x)=-2x^2+4x-7\\\\x=-4,\ subtitute\\\\f(-4)=-2\cdot(-4)^2+4\cdot(-4)-7=-2\cdot16-16-7\\\\=-32-16-7=-55\\\\\boxed{f(-4)=-55}$

6 0

3 years ago

Read 2 more answers

Solve for X. -8x - 4(x - 4) = 88 Please show work

monitta

Hi there!

»»————-　★　————-««

I believe your answer is:

$\huge x=-6$

»»————-　★　————-««

Here’s why:

⸻⸻⸻⸻

$\boxed{\text{Solving for 'x'...}}\\\\-8x-4(x-4)=88\\-------------\\\rightarrow -8x-4x+16=88\\\\\rightarrow -12x + 16 = 88\\\\\rightarrow -12x + 16 - 16 = 88 - 16\\\\\rightarrow -12x = 72\\\\\rightarrow \frac{-12x=72}{12}\\\\\rightarrow \boxed{x=-6}$

⸻⸻⸻⸻

»»————-　★　————-««

Hope this helps you. I apologize if it’s incorrect.

4 0

3 years ago

Read 2 more answers