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
schepotkina [342]
3 years ago
15

Every evening Jenna emptied her pocket and put your change in a jar at the end of the week she counts her money one week she had

40 coins all of the them dimes and quarters then she added them up she had a total of $7.75
Mathematics
1 answer:
Lelu [443]3 years ago
3 0

Answer:

Jenna had 25 quarters and 15 dimes.

Step-by-step explanation:

Let Q = the number of quarters and D = the number of dimes.

Then:

1) Q+D = 40 "One week she had 40 coins, all of them dimes and quarters...."

2) 0.25Q+0.1D = $7.75 "...she had a total of $7.75."

Rewrite equation 1) as: D = 40-Q and substitute into equation 2).

2a) 0.25Q+0.1(40-Q) = 7.75 Simplify the left side.

 

2b) 0.25Q+4-0.1Q = $7.75 Subtract 4 from both sides.

2c) 0.25Q-0.1Q = 3.75 Combine the like-terms on the left side.

2d) 0.15Q = 7.75 Divide both sides by 0.15

2e) Q = 25 and:

D = 40-Q

D = 40-25

D = 15

Jenna had 25 quarters and 15 dimes.

You might be interested in
In the diagram below AE = 6, EB = 3, and DE = 2. Find CE
cluponka [151]

Theorem: If two chords intersect within a circle, then the product of the lengths of the segments (parts) of one chord is equal to the product of the lengths of the segments of the other chord.

In your case,

AE\cdot EB=CE\cdot ED.

If AE = 6, EB = 3, and DE = 2, then

6\cdot 3=CE\cdot 2,\\ \\CE=\dfrac{6\cdot 3}{2}=9.

Answer: correct choice is D.

4 0
3 years ago
Some racquet balls are sold in cylindrical cans of three balls. Each ball has a diameter of 2.25 inches. The can has a diameter
kicyunya [14]

Volume of 1 ball = 4/3 π r³ = 4/3 (3.14) (2.25 ÷ 2)³ = 5.961 in³


Volume of 3 balls = 5.961 x 3 = 17.883 in³


Volume of cylinder = πr²h = (3.14) (2.25 ÷ 2)² (6.75) = 26.825 in³


Empty Space = 26.825 - 17.883 = 8.94 in³ (nearest hundredth)


Answer: 8.94 in³

8 0
3 years ago
Read 2 more answers
Need help on this one too
DedPeter [7]

Answer:

sin(θ)=4√41/41

cos(θ)=5√41/41

tan(θ)=4/5

cot(θ)=5/4

sec(θ)=√41/5

csc(θ)=√41/4

Step-by-step explanation:

4 0
3 years ago
Of the following integers, which is the closest approximation to (2√+5√)2(2+5)2?A. 7B. 10C. 13D. 15E. 17
MAXImum [283]

Answer:

C. 13

Step-by-step explanation:

from on online source, the question should be placed as thus:

Of the following integers, which is the closest approximation to (√2 + √5)^2 ?

A. 7

B. 10

C. 13

D. 15

E. 17

This is known as Algebraic expression. So we have to expand to simplify further

using  this identity  th (a+b)^2 = a^2 + b^2 +2ab

(√2 + √5)^2 =

(√2 + √5)(√2 + √5)

................Expansion of the above

\sqrt{2}* \sqrt{2} +\sqrt{2}* \sqrt{5} +\sqrt{2} *\sqrt{5}+\sqrt{5} *\sqrt{5}

2 + 5 + 2√10

~ 2 +5 + 2(3)

C. 13

3 0
3 years ago
Please help I will give brainliest
Oksi-84 [34.3K]

Answer:

-273c

Step-by-step explanation:

4 0
3 years ago
Other questions:
  • Please help my answer is c, is this right!
    6·1 answer
  • What value of t makes the following equation true?<br> 3(t−2)=−1
    5·2 answers
  • -3а- 8+2а = 13<br><br> How do you solve this (like terms)
    12·2 answers
  • What are the 2 values that fill in both lines?
    6·1 answer
  • [15 POINTS] Please help me!
    14·2 answers
  • Find the sum. Express your answer in lowest terms. 3/8+5/12<br> AAAHHH!!!! Help!!!!!
    12·2 answers
  • Tell whether the blue figure is a translation, reflection, rotation, or dilation of the red figure,
    14·2 answers
  • Help me find the rate of change
    10·1 answer
  • Your parents want to leave a 20 percent tip. The tip is calculated on the total amount of the meal and tax.
    10·1 answer
  • Consider the Expression
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!