1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
andrey2020 [161]
2 years ago
8

John is 5 years younger than David. Four years later David will be twice as old as John. Find their present age.​

Mathematics
1 answer:
Harrizon [31]2 years ago
7 0

David will be 10 and John will be 9

You might be interested in
In Exercise, find the derivative of the function.<br> y = e5x
mariarad [96]

Answer: The derivative of the function y=e^{5x} is 5e^{5x} .

Step-by-step explanation:

We know that the derivative of e^{ax} with respect to x is given by :

\dfrac{d}{dx}(e^{ax})= a e^{x}    (1)

The given function is y=e^{5x}

Differential both sides with respect to x , we get

\dfrac{dy}{dx}=\dfrac{d}{dx}(e^{5x})

\Rightarrow\ \dfrac{dy}{dx}=5e^{5x} ( Using (1))

Therefore , the derivative of the function y=e^{5x} is 5e^{5x} .

4 0
4 years ago
Analyze the diagram below and complete the instructions that follow.Find m
vladimir2022 [97]
Answer: 70.5°

Solution:

Call B, the measure of the angle CBA

cos(B) = adjacent-leg / hypotenuse = 3 / 9 = 1 / 3

=> B = arc cos (1/3) ≈ 70.5°

I will calculate other measures for you, trying to cover the most common ratios: sine, cosine, tangent

1) (segment CA)^2 + (segment BC)^2 = (hypotenuse)^2

=> (segment CA )^2 = (hypotenuse)^2 - (segment BC)^2 = 9^2 - 3^2 = 81 - 9 = 72

=> segment CA = √72 = 6√2

2) sin(B) = opposite-leg / hypotenuse = 6√2 / 9 =2√2 / 3

3) sin(A) = cos(B) = 1/3

4) cos(A) = sin(B) = 2√2 / 3

5) tan(B) = opposite-leg / adjacent-leg = (2√2 / 3 ) / 3 = 2√2 / 9

6) tang(A) = 3 / (2√2 /3) = 9 /( 2√2) = 9√2 / 4

3 0
4 years ago
Find the area of the figure by subtraction.
Grace [21]
I guess the only way to use subtraction is to take the total area of the grid and subtract it by the total area around the figure. So it since it is a 10 by 10 grid, it would be 100 (since 10*10=100) minus the area around the shape.  
5 0
3 years ago
A liquid in the lab has a density of 1.24 g/cm3. What is the mass in grams of 254 ml of the liquid
Airida [17]

Answer:

<h2>The answer is 314.96 g</h2>

Step-by-step explanation:

The mass of a substance when given the density and volume can be found by using the formula

<h3>mass = Density × volume</h3>

From the question

volume of liquid = 254 mL

Density = 1.24 g/cm³

The mass is

mass = 254 × 1.24

We have the final answer as

<h3>314.96 g</h3>

Hope this helps you

5 0
3 years ago
How many segments of length x will fit into the circumference of this circle? Express your answer to the nearest hundredth.
Trava [24]

Answer:

<h2><u><em>the circumference of a circle is defined as:</em></u></h2><h2><u><em></em></u></h2><h2><u><em>c = pi*diameter</em></u></h2><h2><u><em></em></u></h2><h2><u><em>if we have x segments of length y, then we can fit:</em></u></h2><h2><u><em></em></u></h2><h2><u><em>c/y = z</em></u></h2><h2><u><em></em></u></h2><h2><u><em>we can fit z segments of size y on the circumference c</em></u></h2><h2><u><em></em></u></h2>

<u><em></em></u>

6 0
3 years ago
Other questions:
  • The height and diameter of a cylindrical cup are the same length. The volume of the cup is 54pi in3 what is the radius and the h
    14·1 answer
  • What is the area of the shaded region?
    14·1 answer
  • 17/3 as a mixed number
    14·2 answers
  • Sam divided a rectangle into 8 congruent rectangles that each have the area shown. What is the area of the rectangle before Sam
    12·1 answer
  • The equation she came up with is y= x + 6 but her teacher said she was wrong. Find Macy's mistake and and how to fix it.
    10·1 answer
  • 5 lb hamburger for 12 people​
    11·2 answers
  • Jon’s Ice Cream Parlor is a store that sells 120 ice cream cones a day. If sales increase by 75%, how
    10·1 answer
  • If Cp = Rs 660, Loss percent = 5% find Sp​
    11·1 answer
  • Find the measure of each acute angle in the figure.
    7·1 answer
  • How many equal sides does a equilateral triangle have​
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!