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
Vaselesa [24]
2 years ago
12

Gwen bought 4 books about plants and 9 books about fish. She also bought 8 science magazines. Each book cost $12 and each magazi

ne cost $5. How much did Gwen spend in all?
PLZZZZZZZZ HELP U WILL GET 20 POINTS!! AND BRAINLIST!!
Mathematics
2 answers:
Elan Coil [88]2 years ago
6 0

Answer:

196

Step-by-step explanation:

12*13+8*5

sesenic [268]2 years ago
6 0

Answer:

$196

Step-by-step explanation:

First, you have to know how many total there are for each. In total, there are 13 books and 8 magazines. We also need to know how much all of these cost. So, you multiply 13 by 12 to find the total cost of the books. 13 books times 12 dollars each is <u>$156</u>. Now, we do the same for the magazines. 8 magazines times 5 dollars each is <u>$40</u>. To find how much she spent in all, you have to add the two numbers.

$156 plus $40 is $196.

You might be interested in
The time for this event for boys in secondary school is known to possess a normal distribution with a mean of 460 seconds and a
AlekseyPX

Answer:

The time that the boys need to beat in order to earn a certificate of recognition from the fitness association is 511.264 seconds.

Step-by-step explanation:

We are given that the time for this event for boys in secondary school is known to possess a normal distribution with a mean of 460 seconds and a standard deviation of 40 seconds.

The fitness association wants to recognize the fastest 10% of the boys with certificates of recognition.

<u><em>Let X = time for this event for boys in secondary school</em></u>

SO, X ~ Normal(\mu=460,\sigma^{2} =40^{2})

The z-score probability distribution for normal distribution is given by;

                               Z = \frac{X-\mu}{\sigma} ~ N(0,1)

where, \mu = mean time = 460 seconds

            \sigma = standard deviation = 40 seconds

The Z-score measures how many standard deviations the measure is away from the mean. After finding the Z-score, we look at the z-score table and find the p-value (area) associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X.

<u>Now, it is given that the fitness association wants to recognize the fastest 10% of the boys with certificates of recognition, which means;</u>

       P(X > x) = 0.10   {where x is the required time which boy need to beat}

       P( \frac{X-\mu}{\sigma} > \frac{x-460}{40} ) = 0.10

        P(Z > \frac{x-460}{40} ) = 0.10

<em>So, the critical value of x in the z table which represents the top 10% of the area is given as 1.2816, that is;</em>

<em>                   </em>      \frac{x-460}{40} =1.2816

                         {x-460}{} =1.2816\times 40

<em>                           </em>x = 460 + 51.264 = <u>511.264 seconds</u>

Hence, the time that the boys need to beat in order to earn a certificate of recognition from the fitness association is 511.264 seconds.

8 0
3 years ago
What is the difference between these fractions?<br><br> +3/4−(+7/8)
Ket [755]

Answer:

1/8

Step-by-step explanation:

3/4 is 6/8 and 6/8 - 7/8 is 1/8

4 0
2 years ago
Read 2 more answers
Order 1 1/3 1.34 and 1.3 from least to greatest
qaws [65]

Answer:

1 1/3 as a decimal is 1.333 so i think the answer would be 1.3, 1.34, then 1.333

4 0
3 years ago
Find the area of the
Alex73 [517]

162 m^2

you can make a triangle in the corner with legs length s/2 and the angles are 45 degrees. in a 45 45 90 triangle, the legs are h/sqrt(2) where h is the hypotenuse. this means that s/2=9/2 sqrt(2), s=9 sqrt(2)

and s^2=162

5 0
3 years ago
2 feet equal how many inches
djverab [1.8K]
 To answer that it = 2 feet = 24 inches 
8 0
3 years ago
Read 2 more answers
Other questions:
  • What is equation is equivalent to 6(3p-2)=20?
    11·2 answers
  • What is the value of the variable
    10·1 answer
  • 3. A function f(x) has a slope of -and passes through
    14·1 answer
  • A tank is filled with 1000 liters of pure water. Brine containing 0.07 kg of salt per liter enters the tank at 9 liters per minu
    7·1 answer
  • ABC Bookstore rents a storage space that is 60 ft x 40 ft and 12 ft high. It is
    11·2 answers
  • Nolan gives some pans of brownies to his 3 friends equally If he has 1/3 pans of brownies, how many pans of brownies will each f
    14·2 answers
  • Plz solve 20 points plz solve plz solve
    5·2 answers
  • What is the answer to the question?​
    7·2 answers
  • E) Fill in "AT", "IN" or "ON":
    15·1 answer
  • 4800 persons run a marathon, 1200 reach the finish line. What is the percent of people reach the finish line at the marathon?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!