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
goldenfox [79]
3 years ago
9

-

Mathematics
1 answer:
Valentin [98]3 years ago
7 0

Answer:

  • Todd: 25
  • Andrew: 45

Step-by-step explanation:

We can let "a" stand for the number of goldfish Andrew has. Then the number Todd has is (70-a). We are told the difference is ...

  a - (70-a) = 20

  2a = 90 . . . . . . .  .collect terms, add 70

  a = 45

  70-a = 25

Andrew has 45 goldfish; Todd has 25.

_____

<em>Comment on the problem</em>

I call this a "sum and difference" problem. You are given the total of two counts, and also their difference. If you were paying attention to the above solution, you see that <em>the larger of the counts</em> is (70+20)/2, <em>half the sum of the given numbers</em>. This is generically true of all <em>sum and difference</em> problems.

Knowing this, you can work most of these problems in your head.

You might be interested in
Solve for x, the figure is a parallelogram. will give brainliest, pls show work !!
MakcuM [25]

Answer:

x = 7

Step-by-step explanation:

In a parallelogram the opposite angles are congruent, then

14x + 8 = 106 ( subtract 8 from both sides )

14x = 98 ( divide both sides by 14 )

x = 7

6 0
2 years ago
Read 2 more answers
How do you know that the right triangles are the bases of the prism
zysi [14]

Answer:

if the triangular faces are equilateral, the prism is regular, in which case the rectangular faces are congruent. The rectangular faces are said to be lateral, while the triangular faces are bases. If the bases are horizontal, they are sometimes called the top and the bottom (faces).

Read more on Brainly.com - brainly.com/question/16526384#readmore

Step-by-step explanation:

4 0
3 years ago
Please help me with this​
Licemer1 [7]

Answer:

`184.61

Step-by-step explanation:

i got this by dividing the 3000 by the price of 32.50 and then multiplying it by 2 to get the depth im not fully sure if this is correct but i tried and i hope this helps!

3 0
3 years ago
Find the proportion of heights that are within 1 standard deviation of the sample mean and also the proportion that are within 2
Bess [88]
For a normal distribution <em>only, </em>for a population, not for particular sample.

proportion between 1 standard deviation, independent of &mu; and &sigma; , is given by:
P(Z<1)-P(Z<-1)
=0.841345-0.158655=0.682689
=0.68  (to two places of decimal)

proportion between 2 standard deviations, independent of &mu; and &sigma; , is given by:
P(Z<2)-P(Z<-2)
=0.977250-0.022750=0.954500=0.95  (to two places of decimal)
8 0
3 years ago
Let f(x) =2x-2. Graph g(x)= f(x+1)
Ghella [55]

Answer:

itself was just<em><u> </u></em><em><u>an</u></em><em><u> </u></em><em><u>awesome</u></em><em><u> </u></em><em><u>game</u></em><em><u> </u></em><em><u>that</u></em><em><u> </u></em><em><u>had</u></em><em><u> </u></em><em><u>the</u></em><em><u> </u></em><em><u>game</u></em><em><u> </u></em><em><u>in</u></em><em><u> </u></em><em><u>one</u></em><em><u> </u></em><em><u>game</u></em><em><u> </u></em><em><u>for</u></em><em><u> </u></em><em><u>my</u></em><em><u> </u></em><em><u>friends</u></em><em><u>.</u></em>

5 0
2 years ago
Other questions:
  • F (x) = x - 5, what marches f (-1)
    6·1 answer
  • Tyron has a choice between two carpets that he likes equally well. One costs $12.50 per Square yard; the other costs $1.70 per s
    5·1 answer
  • The first question<br><br> Is it A B C, or D?<br><br> Explain why
    14·1 answer
  • How do you turn a fraction into a percent
    7·2 answers
  • How do you solve 12x+24y+102=90
    12·2 answers
  • Which choice is equivalent to the expression below?
    14·2 answers
  • The graphs below have the same shape. What is the equation of the blue graph?​
    11·1 answer
  • Whats 13⁵+234⁶=7⁹<br> Brainlest
    8·1 answer
  • If AC = 2x + 13 and DB = 4x - 1. Find DB
    15·1 answer
  • HELP ASAP ITS TIMED
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!