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
CaHeK987 [17]
3 years ago
7

Which list contains three multiples of 9?

Mathematics
2 answers:
max2010maxim [7]3 years ago
6 0

Answer:

A

Step-by-step explanation:

9 * 7 = 63

9 * 8 = 72

9 * 10 = 90

Montano1993 [528]3 years ago
5 0

Answer:

A

63 ÷ 9 = 7

72 ÷ 9 = 8

90 ÷ 9 = 10

You might be interested in
Choose exactly two answers that are correct. Which expressions could complete this equation so that it has an infinite number of
Maru [420]
Answers A and <span>D
</span><span>

</span><span>9x − 3(x+8) [distribute] = 9x − 3x − 24 = 6x − 24   [combine like terms]

</span>
<span>8(x−3)−2x = [distribute]  8x−24−2x = 6x−24  [combine like terms] </span>
3 0
3 years ago
How many kilograms of a 5% salt solution and how many kilograms of a 15% salt solution must be mixed together to make 45kg of an
JulsSmile [24]

Answer:

31.5 kilograms of a 5% salt solution and 13.5 kilograms of a 15% salt solution must be mixed together to make 45kg of an 8% salt solution .

Step-by-step explanation:

Let us assume that the number of kilograms of a 5% salt solution used be x .

Let us assume that the number of kilograms of a 15% salt solution used be y .

As given

A 5% salt solution and 15% salt solution must be mixed together to make 45kg of an 8% salt solution .

Equation becomes

x + y = 45

5% is written in the decimal form .

= \frac{5}{100}

= 0.05

15% is written in the decimal form .

= \frac{15}{100}

= 0.15

8% is written in the decimal form .

= \frac{8}{100}

= 0.08

Thus

Concentration of 5% salt solution × Number of kilograms of 5% salt solution used + Concentration of 15% salt solution × Number of kilograms of  15% solution used = Concentration of 8% salt solution × Number of kilograms of 8% salt solution

Thus

0.05x + 0.15y = 0.08 × 45

Simplify the above

\frac{5x}{100} + \frac{15y}{100} = \frac{8\times 45}{100}

5x + 15y = 360

Thus two equations becomes

x + y = 45

5x + 15y = 360

Multiply x + y = 45 by 5 and subtracted from 5x + 15y = 360 .

5x - 5x + 15y - 5y = 360 - 225

10y = 135

y = \frac{135}{10}

y = 13.5 kilograms

Put value of y in the equation

x + 13.5 = 45

x = 45 - 13.5

x = 31.5 kilograms

Therefore the 31.5 kilograms of a 5% salt solution and 13.5 kilograms of a 15% salt solution must be mixed together to make 45kg of an 8% salt solution .

5 0
2 years ago
Are the following two binomials
Rainbow [258]

Answer: x = 2/3

Step-by-step explanation:

7 0
2 years ago
It takes 40 minutes for 8 people to paint 4 walls. How many minutes does it take 10 people to paint 7 walls?
77julia77 [94]
Let's first break it down to the time 8 people need for one wall. That would be 10 minutes, right? If one person would have to do it in stead of 8, you'd expect him to take 80 minutes.

To paint 7 walls, he would nee 7x80 = 560 minutes. 10 people would do that 10 times faster, ie., 56 minutes.

I know puzzles like these always have a mindtrick. Did I miss anything?? ;-)
3 0
3 years ago
Help me please !!!!!!!!!!!!!!
tensa zangetsu [6.8K]

Answer:

\large\boxed{V=\dfrac{49\pi}{3}\ in^3}\approx51.29\ in^3}

Step-by-step explanation:

The formula of a volume of a cone:

V=\dfrac{1}{3}\pi r^2H

r - radius

H - height

We have

r = (7 : 2) in = 3.5 in

H = 4 in

Substitute:

V=\dfrac{1}{3}\pi(3.5)^2(4)=\dfrac{1}{3}\pi(12.25)(4)=\dfrac{49\pi}{3}\ in^3

\pi\approx3.14\\\\V\approx\dfrac{(49)(3.14)}{3}\approx51.29\ in^3

5 0
3 years ago
Other questions:
  • Is 4.32 as a mixed number 4 32/100?
    7·2 answers
  • Compute: 3 + [1 − 2(3 − 5)]
    7·2 answers
  • AVENGERS: The Avender movie made $1.6 million in ticket sales. Its sequel made $0.8 million in ticket sales. How much more than
    8·1 answer
  • Answer this question
    5·1 answer
  • Log(x)=5/2 what is the answer?
    15·1 answer
  • 3 teas and 2 coffees have a total cost of £7.80.
    9·1 answer
  • What is the square root of 166?
    10·2 answers
  • 1) A builder laying the foundations of a garage wants to be sure he has the walls of the garage are at right angles. The length
    12·1 answer
  • PLEASE HELP!! Find the equation of the line that is perpendicular to y= -2/3x and contains the point (4,-8).
    10·1 answer
  • Helppppp nowww asappp pretty please? no guessing,
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!