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
JulijaS [17]
3 years ago
12

Robert used 34 grams of iron filings in his second experiment. This is 16 grams more than twice the number of grams he used in h

is first experiment. How many grams of iton filings did he usein his experiment.

Mathematics
1 answer:
sweet-ann [11.9K]3 years ago
3 0

34=2x + 16

18=2x

x=9

Robert used 9 grams of iron filings in his first experiment.

You might be interested in
The 9th graders are selling tickets to raise
Sidana [21]

Answer:

There were 30 children and 10 adults.

Step-by-step explanation:

Since they sold tickets to adults and childrens, the sum of those tickets must be equal to the total tickets that were sold, so we can mount our first equation as shown below:

adult + children = 40

Each adult ticket costs $9 and each children costs $5 and the total recieved was $240, therefore:

9*adult + 5*children = 240

We can mount the following equation system:

adult + children = 40

9*adult + 5*children = 240

We will multiply the first equation by -5 and sum both equations:

-5*adult -5*children = -200

9*adult + 5*children = 240

4*adult = 40

adult = 40 / 4

adult = 10

adult + children = 40

children = 40 - adult = 40 - 10 = 30

There were 30 children and 10 adults.

3 0
3 years ago
HURRY TIMED QUIZ!! ABCD is a rhombus. Find the length of AC. <br> A.20<br> B.30<br> C.26<br> D.16
Inessa05 [86]

Answer:

26

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
Solve the given triangles by finding the missing angle and other side lengths.
coldgirl [10]

Answer:

  1. a ≈ 27.65; B = 28°; c ≈ 19.17
  2. a ≈ 163.30; B = 120°; c ≈ 59.77
  3. A = 13°; b ≈ 0.3874; c ≈ 1.3737

Step-by-step explanation:

As long as you're seeking outside help, the use of a suitable tool is appropriate. Many graphing calculators, apps, and web sites are available for solving triangles.

__

Here, you're given two angles and a side. The third angle is the difference from 180° of the sum of the other two. For example, in the first problem, ...

  B = 180° -A -C = 28°

The missing sides are found using the law of sines. Since you are given a side, use that as the reference, and its opposite angle as the reference angle. Then you have ...

  side = sin(opposite angle)×<em>((reference side)/sin(reference angle))</em>

Note that the factor in italics remains the same for both remaining sides.

__

In the first problem, this becomes ...

  a = sin(112°)·14/sin(28°) ≈ 27.65

  c = sin(40°)·14/sin(28°) ≈ 19.17

__

The remaining problems are worked in similar fashion.

_____

<em>Comment on triangle solutions</em>

These are straightforward because you're given two angles. If you're given two sides and an angle, the solution method varies depending on which angle you're given (opposite the long side, the short side, or the unknown side). In the last case, the law of cosines is involved. In the second case, there are likely two solutions. Once you have two angles, you can proceed as above.

8 0
3 years ago
Read 2 more answers
Show your full solution
alex41 [277]

Answer:

1.the square pan is larger by 12 inches

40 cm^2

Step-by-step explanation:

The difference in size can be determined by calculating the difference between the perimeter of the square pan and the circumference of a circle

perimeter of a square = 4 x length

14 x 4 = 56 inches

Circumference of a circle = πD = (22/7) x 14 = 44 inches

Difference in size = 56 - 44 = 12 inches

Area of a rectangle = length x width

10 x 4 - 40 cm^2

3 0
3 years ago
Pencils are on sale for 25 for $1.25. Based on this rate, how much would one pencil cost?
Marat540 [252]

Answer:

$0.05

Step-by-step explanation:

1.25/25=0.05

6 0
2 years ago
Other questions:
  • The function h(t) = −16t2 + 24t models the height, in feet, of a kangaroo t seconds after it jumps. What is the maximum height o
    8·1 answer
  • Using the transformation T: (x, y) (x + 2, y + 1), find the distance named. Find the distance BB'
    9·2 answers
  • What is 52/7 written as a mixed number?
    14·1 answer
  • What is the relationship between a linear pair and supplementary angles
    7·2 answers
  • Can someone help me with the vertex of the parabola
    5·1 answer
  • Simplify<br>3/8 ÷ 4 step by step<br>​
    15·1 answer
  • Write an equation in slope-intercept form of<br> the line that passes through (-6,4) and<br> (-1,2).
    10·1 answer
  • Preston bought 16 donuts. There were d donuts in each box. Choose the expression that shows how many boxes of donuts Preston bou
    9·1 answer
  • B) Solve x ^ 2 + 5x - 14 = 0
    12·2 answers
  • The transformation you can use to move the solid figure onto the dashed figure.
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!