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
olchik [2.2K]
1 year ago
7

2y + 5 = solve for the correct answer ​

Mathematics
1 answer:
Umnica [9.8K]1 year ago
8 0

let the value of y be 2

Now,

2y+5

2x2+5

4+5

9

Hence,proved

You might be interested in
Name a unit of measurement that is about the same size of the weight or mass of 20 staples.
saul85 [17]

Answer:

D

Step-by-step explanation:

7 0
2 years ago
Read 2 more answers
HELP, I AM UTTERLY CONFUSED *20 points
Studentka2010 [4]
Ok so this question is a bit complicated, but it's easier to understand if you break it down into smaller parts!

1) First, you know that ABGF is half the perimeter of ACDE. This means that the length of one side of ABGF must be 1/2 the length of one side of ACDE.
>> You can think of this by putting in random numbers. Say the perimeter of the larger square is 24 and the perimeter of the smaller square is 12. That means one side of the larger square of 24/4 (b/c four sides) = 6 and one side of the smaller square is 12/4 = 3!

2. Ok know you know the lengths of the sides relative to each other, but you're only given one value: 4in. Since the smaller square has sides that are 1/2 the larger squares, you know that it makes up 1/4 of the larger square! So imagine 4 of those smaller squares filling up that larger square to make a 2 by 2. It just so happens that 4in is the diagonal going through one of our imaginary squares, which is equal in size to ABGF!

3. Now use the 45-45-90 rule to figure out the length of one side of that imaginary square because the 4in diagonal splits that imaginary square into two of those 45-45-90 triangles. You know the hypotenuse of that triangle is 4in. That means one of the legs is 4/✓2 (since the rule says that the hypotenuse and the leg are in a ✓2:1 ratio). And like we said before the length of that leg is the length of the side of our imaginary square. And our imaginary square must be the same size as ABGF! So now we know the side of the smaller square to be 4/✓2!

4. Multiply the side of the smaller square by 2 to get the side of our larger square. (4/✓2)*2=8/✓2

5. Now to find the area of the shaded region, just find the area of the smaller square ABGF and subtract from the larger square ACDE. Use equation for the area of a square!
a =  {s}^{2}
where s=the length of one side.

The length of one side of the smaller square is 4/✓2. So it's area is:
{( \frac{4}{ \sqrt{2} }) }^{2}  =  \frac{16}{2}  = 8

The length of one side of the larger square is 8/✓2. So it's area is:
{ ( \frac{8}{ \sqrt{2} }) }^{2}  =   \frac{64}{2}   = 32

Now subtract. 32-8=24! :)

Hope this helps! Let me know if you have any questions.
3 0
3 years ago
The Lopez Family meets with a financial planner who advises them to save 15% of their income
soldi70 [24.7K]

Answer:

$1281

Step-by-step explanation:

8540 \times  \frac{15}{100}  \\ 1281

5 0
2 years ago
Is the quotient of<br> (-5) ➗ (-7) a rational number? Explain your answer in two or more sentences.
ValentinkaMS [17]
-5/-7 = 5/7 = 0.71428577142857... The decimal form of the fraction never ends, so 5/7 is not a rational number
3 0
3 years ago
Read 2 more answers
If a person takes a prescribed dose of 10 milligrams of Valium, the amount of Valium in that person's bloodstream at any time ca
aleksandr82 [10.1K]

Answer:

(a)8.0mg

(b)36.87 hours

(c)-0.168

Step-by-step explanation:

The amount of Valium in that person's bloodstream at any time can be modeled with the exponential decay function A ( t ) = 10 e^{ -0.0188 t (t in hours)

(a)After 12 Hours

A ( 12) = 10 e^{ -0.0188*12}\\=7.98\\\approx 8.0 mg $(to the nearest tenth of a milligram)

(b)If A(t)=5mg

Then:

5= 10 e^{ -0.0188 t}\\$Divide both sides by 10\\0.5=e^{ -0.0188 t}\\$Take the natural logarithm of both sides\\ln (0.5)=-0.0188 t\\t=ln (0.5) \div (-0.0188)\\$t=36.87 hours (to two decimal places.)

(c)

A ( t ) = 10 e^{ -0.0188 t}\\A'(t)=10(-0.0188)e^{ -0.0188 t}\\A'(t)=-0.188e^{ -0.0188 t}\\$At 6 hours, the rate at which the amount of Valium is decaying therefore is:\\A'(6)=-0.188e^{ -0.0188*6}\\$=-0.168 ( to three decimal places)

3 0
2 years ago
Other questions:
  • I need help with this question.
    10·1 answer
  • Which expression uses the greatest common factor and the distributive property to rewrite the sum 75 + 45?
    13·2 answers
  • 45 POINTS PLEASE HELP
    15·2 answers
  • Define function *it’s for math pls help asap*
    15·1 answer
  • Suppose that y varies jointly with w and x and inversely with z and y = 320 when w = 6, x = 20, and z = 3.
    9·2 answers
  • What is the least common dominator between 2/7 and 5/9
    6·1 answer
  • Find the zeros of the function.
    5·1 answer
  • Write an equation in slope-intercept form for the line with slope 7 and y-intercept -7 .
    13·1 answer
  • Mass = 100g, volume = 20cm^3, what is the density?
    12·1 answer
  • Whats the answer giving brainliest :)&gt;.
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!