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
Alexus [3.1K]
3 years ago
7

Joanna went school supply shopping. She spent $21.45 on notebooks and pencils. Notebooks cost $1.97 each and pencils cost $1.16

each. She bought a total of 15 notebooks and pencils. How many of each did she buy?
A.
5 notebooks; 10 pencils
B.
3 notebooks; 12 pencils
C.
8 notebooks; 7 pencils
D.
10 notebooks; 5 pencils
Mathematics
1 answer:
GarryVolchara [31]3 years ago
5 0

Answer:

A) 5 notebooks, 10 pencils

Step-by-step explanation:

n = notebook

p = pencil

1.97n + 1.16p = 21.45

A)✅

1.97(5) + 1.16(10) = 21.45

9.85 + 11.6 = 21.45

21.45 = 21.45

B) ❌

1.97(3) + 1.16(12) = 21.45

5.91 + 13.92 = 21.45

19.83 = 21.45

You might be interested in
What's the difference between 8 848 and 10 911 meters
Marta_Voda [28]
S what you do is 10,911-8,848=2063 so 2063 is the difference.  the reason i subtracted is because difference also means subtract  <span />
3 0
3 years ago
WILL GIVE BRAINLIEST!! PLSSSSSS HELP!!!!
forsale [732]

Answer:

1872 cm cubed

Step-by-step explanation:

Volume=Length*Height*Width

We know that the height of the prism is 13 cm.

We also know that the lateral area of the prism is 634 cm squared.  

624/4=156

The area of each lateral face is 156 centimeters squared.

The prism's base is a quadrilateral that is regular. This means that the base has equal sides (equilateral) and equal angles (equiangular ).

13x=156

x=12

The base has a side length of 12 cm.

12*13*12=1872

7 0
3 years ago
Suppose ΔDEF has an exterior angle at vertex D. The measure of the exterior angle is (8x−2)º, m∠E=(3x−8)°, and m∠F=(4x+13)°. Wha
miv72 [106K]

The measure of the exterior angle at vertex D is: D. 54°

<em><u>Recall:</u></em>

  • The exterior angle theorem of a triangle states that the measure of an exterior angle equals the sum of the measures of two opposite interior angles of the triangle.

<em><u>Thus:</u></em>

In ΔDEF, (8x−2)º is an exterior angle at vertex D.

m∠E = (3x−8)° (interior angle)

m∠F = (4x+13)° (interior angle)

<em>Therefore:</em>

(8x−2)º = (3x−8)° + (4x+13)°

  • Solve for x

8x - 2 = 3x - 8 + 4x + 13

  • Combine like terms

8x - 2 = 7x + 5

8x - 7x = 2 + 5

x = 7

Exterior angle at vertex D = (8x−2)º

  • Plug in the value of x

= 8(7) - 2

= 54º (option D)

Learn more about exterior angle theorem on:

brainly.com/question/24756010

7 0
3 years ago
Which set of ordered pairs does not represent a function?
Lunna [17]

Answer:

D

Step-by-step explanation:

(0, 0) (0, 1) (1, 2) (1, 3)

For it to be a function each x value should have one y value.

There are two 0's for x and two 1's for x. This is how you can tell it's not a function.

7 0
3 years ago
Read 2 more answers
If p and q vary inversely and p is 10 when q is 19 , determine q when p is equal to 2
GenaCL600 [577]
You divide 10 by 5 is two so 19 decided by five is 3.8
6 0
3 years ago
Read 2 more answers
Other questions:
  • Estimate the square root of 25<br> to the nearest integer
    14·2 answers
  • Perpendicular bisector of MU. Find the values of m.
    15·1 answer
  • What is the unit rate for inches burned per hour
    9·1 answer
  • 3) The volume of a sphere is 7234.56ft3. Find the diameter.
    12·1 answer
  • Jackrabbits are capable of reaching speeds up to 40 miles per hour. How fast is this in feet per second? (Round to the nearest w
    6·1 answer
  • I don’t know to do this
    7·1 answer
  • How many moles of LiOH are in 67.03g?
    10·1 answer
  • Find the EQUATION of the line with exact numbers
    5·2 answers
  • Pls be right will give brainliest
    15·1 answer
  • The probability distribution for a random variable x is given in the table. -5 -3 -2 0 2 3 Probability .17 .13 33 16 11 10 Find
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!