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
Alex Ar [27]
3 years ago
5

What value of x makes this proportion true?

Mathematics
1 answer:
Trava [24]3 years ago
8 0
The answer is 5:) you first have to cross multiply then divide both sides from x
You might be interested in
Triangle ABC is represented by the drawing below.
zhannawk [14.2K]

Step-by-step explanation:

Therefore,

(x+20) + (x-10) + (2x-30) = 180° (Sum of interior angles of a triangle)

Or, x+x+2x+20-10-30 = 180°

Or, 4x-20 = 180°

Or, 4x= 180+20

Or, 4x= 200°

Or, x= 200°/4

Therefore, x= 50°

So,

(x+20)

= 50+20

=70°

(x-10)

= 50-10

40°

(2x-30)

= 2×50-30

=100-30

=70°

Hope it helped, If it did, please mark it as the brainliest answer :)

3 0
3 years ago
The diameter of cold virus cell is about 3x10-9 meter,and the diameter of a streptoccus bacterium cell is about 9x10-7 meter. Wh
Archy [21]

Here we need to compare the orders of magnitude of two measures.

We will see that the bacteria is<em> 300 times larger than the virus.</em>

We know that:

The diameter of the virus-cell is:

D_v = 3 \cdot 10^{-9} m

The diameter of the bacteria cell is:

D_b = 9 \cdot 10^{-7} m

So, to compare them, first notice that both are in the same units, meters, so we only need to <u>compare the numbers</u>.

Is common sense to identify the one with the largest exponent as the largest number, and the largest exponent is -7, thus <u>the bacteria should be the larger one.</u>

But let's prove this with math, remember the property:

\frac{a^n}{a^m} = a^{n - m}

Let's take the quotient between the diameters and see what we get, I will use the <u>diameter of the bacteria in the numerator</u>, thus <u>if the quotient is larger than 1, it would mean that the bacteria is greater and by how much.</u>

quotient = \frac{ 9 \cdot 10^{-7} m}{ 3 \cdot 10^{-9} m}  = \frac{9}{3} \cdot 10^{-7 + 9}\\\\= 3*10^2

So we can say that the bacteria is 3*10^2 = 3*100 = 300 times larger than the virus.

If you want to learn more, you can read:

brainly.com/question/4953281

8 0
2 years ago
The depth of a lake, d, varies directly with r, the amount of rainfall last month. if k is the constant of variation, write an e
irina1246 [14]
Answer:
d = kr

Explanation:
We know that the depth (d) varies directly with the amount of rain (r).
This means that as the amount of rain increases, the depth increases and vice-versa.
The depth would depend on r multiplied by a constant of variation (k)

Translating this into equation, we would get the following:
d = kr

Hope this helps :)
4 0
3 years ago
Fully factorise 8x+24
irinina [24]
8(x+3)
In this form, it is fully factored. All you need is a GCF, which is 8.
Hope this helps!
6 0
3 years ago
Read 2 more answers
What is the difference between a quadratic function and a quadratic equation​
jeka57 [31]

Answer:

The roots of a quadratic equation simply tell what values of x will make the equation true. A quadratic function is a function where the largest power for the variable is 2. ... A quadratic equation is given to you so that you can solve it for the variable. A quadratic function is given to you so that you can graph it.

3 0
2 years ago
Read 2 more answers
Other questions:
  • Captain Two-Pegs is going to load his pirate ship with cannons. He has room for 10 cannons. He has allotted for 111 pounds of ca
    15·2 answers
  • What chacharacteristic help you tell the difference between a rhombus and a rectangle? Explain.
    10·2 answers
  • 2+0=2 What property is illustrated? A. associative property of addition B. commutative property of addition C. identity property
    7·2 answers
  • If you're reproducing a 4 cm x 4 cm picture on a 3 mx 3 m<br> wall, what ratio should you use?
    5·1 answer
  • In algebra, there are lots of rules and properties to remember. The good news is that once you understand them, you can apply th
    6·1 answer
  • Leon drew 2 fraction cards that were between 1/6 and 1/2. The sum of the 2 cards are between?
    9·1 answer
  • Find the possibability of 1 head when flipping 3 coins
    15·1 answer
  • By selling a radio with 12% profit , the profit
    6·1 answer
  • Solve the inequality 9/2 + v &gt; 7/5
    14·1 answer
  • Ang<br> Name two vertical angles, two supplementary<br> angles in the diagram below.
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!