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
Alexeev081 [22]
3 years ago
13

so here's my problem from pearson realize lesson 4-8 grade 7 math book. can someone help me int this question

Mathematics
1 answer:
Allushta [10]3 years ago
6 0

a) 0.92v or 23v/25 or 92%v


b)Oringaly, there was 100%. 8% was token away, so 100%-8%=92%


You might be interested in
Determine if the solution set for the system of equations shown is the empty set, contains one point or is infinite. 5x+7=2y and
Luda [366]

Answer:

The correct option is option B. It has one solution, and it's x=-3

Step-by-step explanation:

We have the following system of equations:

5x+7 = 2y                        (1)

y-9x=23                            (2)

Step 1: Solve for 'y' in equation (2):

y-9x = 23

y = 9x + 23

Step 2: Substitute in equation (1):

5x + 7 = 2y

5x + 7 = 2(9x + 23)

5x + 7 = 18x + 46

Step 3: Solve for x:

7 - 46 = 18x - 5x

-39 = 13x

x= -3

So the correct option is option B. It has one solution, and it's x=-3

7 0
3 years ago
Read 2 more answers
A box of cereal states that there are 93 calories in a three fourths
cupoosta [38]

93/3 = 31, 31 x 4= 124

Calories per cup is 124

There are 372 calories in three cups

7 0
3 years ago
300 ml of pure alcohol is poured from a bottle containing 2 l of pure alcohol. Then, 300 ml of water is added into the bottle. A
Ede4ka [16]

Answer:

The present percentage of pure alcohol in the solution is 72.25% of pure alcohol

Step-by-step explanation:

The volume of pure alcohol poured from the 2 l bottle of pure alcohol = 300 ml of pure alcohol

The volume of water added into the bottle after pouring out the pure alcohol = 300 ml of water

The volume of diluted alcohol poured out of the bottle = 300 ml of diluted alcohol

The volume of water added into the bottle of diluted alcohol after pouring out the 300 ml of diluted alcohol = 300 ml of water

Step 1

After pouring the 300 ml of pure alcohol and adding 300 ml of water to the bottle, the percentage concentration, C%₁ is given as follows;

C%₁ = (Volume of pure alcohol)/(Total volume of the solution) × 100

The volume of pure alcohol in the bottle = 2 l - 300 ml = 1,700 ml

The total volume of the solution = The volume of pure alcohol in the bottle +  The volume of water added = 1,700 ml + 300 ml = 2,000 ml = 2 l

∴ C%₁ = (1,700 ml)/(2,000 ml) × 100 = 85% percent alcohol

Step 2

After pouring out 300 ml diluted alcohol from the 2,000 ml, 85% alcohol and adding 300 ml of water, we have;

Volume of 85% alcohol = 2,000 ml - 300 ml = 1,700 ml

The volume of pure alcohol in the 1,700 ml, 85% diluted alcohol = 85/100 × 1,700 = 1,445 ml

The total volume of the diluted solution = The volume of the 85% alcohol in the solution + The volume of water added

∴ The total volume of the twice diluted solution = 1,700 ml + 300 ml = 2,000 ml

The present percentage of pure alcohol in the solution, C%₂ = (The volume of pure alcohol in the 1,700 ml, 85% diluted alcohol)/(The total volume of the diluted solution) × 100

∴ C%₂ = (1,445 ml)/(2,000 ml) × 100 = 72.25 %

The present percentage of pure alcohol in the solution, C%₂ = 72.25%

3 0
3 years ago
There was a triangle that had sides that were 5. 6, 6. 5, and 8.7 inches in length If Rochelle wanted to create a larger triangl
r-ruslan [8.4K]

Answer:

The answer is: 11.2, 13 and 17.4

Step-by-step explanation:

The scale factor of 2 means that we will build a triangle with sides of double lenght than original one.

So sides will be

5.6\times 2=11.2

6.5\times 2=13

8.7\times 2=17.4

6 0
3 years ago
Work out x when 3x +x +90= 360
mart [117]
X=67.5 or 135/2 or 67 1/2
4 0
3 years ago
Other questions:
  • Solve the inequality -8 < -8x
    6·1 answer
  • Plz help !!!!!!!!!!!
    12·2 answers
  • Nehemiah wants to create a function to represent the change in his income over the past few months. Nehemiah estimates that the
    8·1 answer
  • On a trip, you drove 150.75 miles in 2 hours and 35 minutes. At this rate, how long will it take you to travel 450 miles? Round
    14·1 answer
  • 50 POINTS !!<br><br><br> PLEASE HELP AND EXPLAIN !! ILL GIVE BRAINLIEST TO THE RIGHT ANSWERS.
    6·2 answers
  • What word phrase can you to represent the algebraic expression? 5x + 2​
    15·1 answer
  • A company loses $5,400 as the result of a manufacturing defect. Each of the 8 owners have agreed to pay an equal amount, x, to p
    13·2 answers
  • The coordinates of the three vertices of the triangle are A (x1, y1), B (x2, y2), C (x3, y3).
    5·1 answer
  • Help please<br> :)))) ))))))))
    7·1 answer
  • ASAP please help me!!
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!