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
erik [133]
3 years ago
13

Please help with this simultaneous equation you can use any method(Only number 6)

Mathematics
1 answer:
igomit [66]3 years ago
4 0

Answer:

Pencil: $0.60 Rubber: $0.48

Step-by-step explanation:

Let the cost of a pencil be p and the cost of a rubber be r.

p+r=1.08  (Equation 1)

4p=5r  (Equation 2)

Divide both sides by 4:

p=\frac{5}{4} r

Substitute this into Equation 1:

\frac{5}{4} r+r=1.08

Multiply both sides by 4:

\frac{5}{4}r* \:4+r* \:4=1.08*4

5r+4r=4.32

9r=4.32

Divide both sides by 9:

\frac{9r}{9}=\frac{4.32}{9}

r=0.48

Since r + p = 1.08,

p=1.08=0.48=0.60

You might be interested in
Change 33/4 to a mixed number
BaLLatris [955]

Answer:

Step-by-step explanation:

33/4 already reduced (simplified) Improper fraction, rewrite it as a mixed number: 33 ÷ 4 = 8 and remainder = 1 => 33/4 = (8 × 4 + 1)/4 = 8 + 1/4 = 8 1/4

5 0
3 years ago
Read 2 more answers
Find the distance between the points S(-5, -2) and T(-3, 4)
Leviafan [203]

Answer:

6.32

Step-by-step explanation:

The x difference:

-5  - -3 = -2

The y difference:

-2 - 4 = -6

Distance:

-6² + -2² = 40

√40 ≅ 6.32

4 0
3 years ago
Joe sold a total of 10 baked goods. Each cookie costs $1.25 and each brownie costs $2.50. Joe made $20 at the bake sale. How man
AURORKA [14]

Answer:

4 cookies

Step-by-step explanation:

Let the number of cookies he sold be c and that of brownies be b.

Assuming that brownies and cookies are the only type of baked goods sold,

b +c= 10 -----(1)

Amount of money received= $20

b(cost of brownie) +c(cost of cookie)= $20

2.50b +1.25c= 20 -----(2)

From (1): b= 10 -c -----(3)

Substitute (3) into (2):

2.50(10 -c) +1.25c= 20

Expand:

2.50(10) +2.50(-c) +1.25c= 20

25 -2.50c +1.25c= 20

-1.25c +25= 20

Being constants to 1 side:

-1.25c= 20 -25

-1.25c= -5

c= -5 ÷(-1.25)

c= 4

Thus, Joe sold 4 cookies.

8 0
3 years ago
PLEASE HELP WILL MARK BRAINLEIST
wolverine [178]

Answer:

The second one.

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
Nia and Trey both had sore throats, so their mom told them to gargle with warm salt water. Nia mixed 1 teaspoon salt with 3 cups
Harrizon [31]

Answer:

Each mixture has the same amount of salt for every 1 cup of water.

Step-by-step explanation:

It is provided that:

  • Nia mixed 1 teaspoon salt with 3 cups warm water.
  • Trey mixes 1 /2 teaspoon salt with one and 1/2 cups warm water.

The ratio of the number of teaspoons of salt to the number of cups of water is 1 : 3 in Nia's solution.

On dividing the amount of salt and the amount of water by 3, the ratio will be the same.

\text{Salt}: 1\div3=\frac{1}{3}\\\\\text{Water}:3\div3=1\\

Thus 1 : 3 is equivalent to the ratio \frac{1}{3}:1, which means that Nia's solution has \frac{1}{3}teaspoon of salt for every cup of water.

The ratio of the number of teaspoons of salt to the number of cups of water is \frac{1}{2}:1\frac{1}{2} in Trey’s solution.

On dividing the amount of salt and the amount of water by 1\frac{1}{2}, the ratio will be the same.

\text{salt}:\frac{1}{2}\div 1\frac{1}{2}=\frac{1}{3}\\\\\text{Water}:1\frac{1}{2}\div1\frac{1}{2}=1

So Trey’s ratio is also equal to the ratio \frac{1}{3}:1.

Since each mixture has the same amount of salt for every 1 cup of water, they are equally salty and taste the same.

4 0
3 years ago
Other questions:
  • Multiply 1.76 × 56.3 = ____
    7·2 answers
  • In a repeating musical pattern there are 56 beats in 7 measures how many measures are there after 104 beats?
    14·1 answer
  • What’s the capital of France? answer and you'll get brainly!!
    10·2 answers
  • The distance, h, in feet above the ground of a point on the circular frame of a Ferris Wheel is given by h=42cos(12t)+46, where
    15·1 answer
  • 12 imperial inches equals how many meters
    13·1 answer
  • 2.
    6·1 answer
  • The box plot below represents some data set. What percentage of the data values are greater than 42?
    13·2 answers
  • See image for question. Please show workings.
    8·1 answer
  • Alison has been hired to sell two different homes on the same street that two houses apart. She predicts that Home A has a 75% c
    13·1 answer
  • Your softball team is ordering equipment from a catalog. Each bat costs $42. The cost of shipping is $12 no matter how much you
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!