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
madam [21]
3 years ago
8

Equations ----- On Saturday, you spend $33, give $15 to a friend, and receive $20 for mowing your neighbor's lawn. You have $21

left. Use TWO methods to find how much money you started with that day.
Please explain. Thanks!
Mathematics
1 answer:
storchak [24]3 years ago
6 0
21-20+15+33 is 1 expression.
You might be interested in
Assuming the volume of a trigonal prism, who has a side of 10cm and a length of 20 cm, is 866cm^3, what is its surface area?
Leno4ka [110]

The surface area of the triangular prism is 686.6 cm².

Step-by-step explanation:

Step 1:

The volume of a triangular prism can be determined by multiplying its area of the triangular base with the length of the prism.

The base triangle has a base length of 10 cm and assume it has a height of h m.

The volume of the prism= \frac{1}{2} (b)(h) (length) = \frac{1}{2} (10)(h)(20) = 866.

h = \frac{866(2)}{10(20)} = 8.66.

The height of the triangle is 8.66 cm.

Step 2:

The surface area of the triangle is obtained by adding all the areas of the shapes in the prism. There are 2 triangles and 3 rectangles in a triangular prism.

The triangles have a base length of 10 cm and a height of 8.66 cm. A triangles area is half the product of its base length and height.

The rectangles all have a length of 20 cm and a width of 10 cm. The area of a rectangle is the product of its length and width.

The area of the 2 triangles = 2 [\frac{1}{2} (10)(8.66)] = 86.6.

The area of the 3 rectangle = 3[(20)(10)] = 600.

Step 3:

The surface area of the triangular prism = 86.6 + 600 = 686.6.

The surface area of the prism is 686.6 cm².

6 0
3 years ago
Divide until it terminates
stich3 [128]
6.4÷30 points 08 equals 0.2127 Hope it helps!! :)
7 0
3 years ago
Show your work on the question
AysviL [449]

Answer:

OPTION A: 3x - 1 = ± 5

Step-by-step explanation:

We have (3x - 1)² = 25

In OPTION A, Square root is taken on both sides.

This gives us: 3x - 1 = ± 5. And this is the logical follow - up of the previous step.

IN OPTION B: (a - b)² is wrongly expanded. So, this can not be the next step.

In OPTION C: The square root is taken only on the LHS but not on the RHS. So, it is eliminated.

In OPTION D: The square is expanded on LHS whereas on the RHS square root is taken. So, it is not correct and is eliminated.

Therefore, the correct option is A.

6 0
3 years ago
Sonji has $5.25 in nickels and dimes.The coin value can be modeled by the equation 0.10d + 0.05n = 5.25, where d represents the
barxatty [35]
<span>To find the number of nickels and dimes, we can use this equation: 0.10d + 0.05n = 5.25

We are given the information that Sonji has 21 dimes (which means that d=21). We can use the equation to find the number of nickels n.

0.10d + 0.05n = 5.25
0.10(21) + 0.05n = 5.25
2.10 + 0.05n = 5.25
0.05n = 3.15
n = 3.15 / 0.05
n = 315 / 5
n = 63

Sonji has 63 nickels.

Let's check our answer.
21(0.10) + 63(0.05) = 2.10 + 3.15 = 5.25
It seems that our answer is correct.</span>
7 0
3 years ago
Read 2 more answers
F(x) = 1?-1.9(x) = x - 2. Find<br> (a) ( + g)(3)
ValentinkaMS [17]

Answer: f(x)=1-1.9x=x-2

Step-by-step explanation:

Big brain time.

4 0
3 years ago
Other questions:
  • A state lottery randomly chooses 7 balls numbered from 1 through 45 without replacement. You choose 7 numbers and purchase a lot
    10·1 answer
  • A race was 493 meters.If 73 people ran in the marathon how many meters would they have run total
    15·2 answers
  • 37.44 +3.79 + 24.1
    12·1 answer
  • Which expression is equivalent to 6(3x-4)
    8·1 answer
  • How many three number codes does a combination lock with 40 numbers have if the numbers can repeat?
    12·1 answer
  • Number 14 plsssssssssssssss
    10·2 answers
  • Helen puts 50 marbles into 9 jars. First, she puts in the greatest
    8·1 answer
  • HELP PLEASE with this question
    5·1 answer
  • Solve the equation.<br><br> ​
    10·1 answer
  • If the perimeter of this triangle is 15 centimeters, what is the value of n?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!