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jarptica [38.1K]
2 years ago
5

Jessie recently drove to visit her parents who live 756 miles away. On her way there her average speed was 21 miles per hour fas

ter than on her way home (she ran into
some bad weather). If Jessie spent a total of 21 hours driving, find the two rates.
Mathematics
1 answer:
mixer [17]2 years ago
4 0

Answer:

the answer is 456 miles per hour

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Maths people please write the answers !<br><br><br> Equations- Maths
Korvikt [17]

Answer:

length = 20cm

breadth = 8cm

Step-by-step explanation:

solution;

length(l) = x + 12

breadth(b) = x

perimeter (p) = 56 cm

we know that,

perimeter(p) = 2(l + b)

or, 56 = 2(x + 12 + x)

or, 56 = 2(2x + 12)

or, 56 = 4x +24

or, 56 - 24 = 4x

or, 32 = 4x

or, 32 / 4 = x

x = 8

now

putting the value of x in length and breadth

length = x+ 12

=8 + 12

=20cm

breadth = 8cm

7 0
3 years ago
Read 2 more answers
Eugene walked all the way to school at 3 mph then realized she forgot her math book (how could she?!), so she ran back at 7 mph.
Fynjy0 [20]

\text{Answer: }1\frac{23}{40}\ miles\text{ far she live from school.}

Explanation:

Since we have given that

Speed at which Eugene walked all the way to school = 3 mph

After realizing that she forgot her math book, she ran back

Speed at which Eugene walked back to her house = 7 mph

Let the distance between her house and her school be x

According to question,

\frac{x}{3}+\frac{x}{7}=\frac{45}{60}\\\\\frac{7x+3x}{21}=\frac{3}{4}\\\\\frac{10x}{21}=\frac{3}{4}\\\\x=\frac{3\times 63}{4\times 10}=\frac{63}{40}=1\frac{23}{40}\ miles.

Hence,

1\frac{23}{40}\ miles\text{ far she live from school.}

8 0
3 years ago
Help with math homework
aliya0001 [1]
You just divide. 38÷12=3.166~ $3.17
4 0
3 years ago
-2(-3x+5y)+3(-4+2y)?????????
Tatiana [17]

Regroup terms

-2(-3x + 5y) + 3(2y - 4)

Expand

6x - 10y + 6y - 12

Collect like terms

6x + (-10y + 6y) - 12

Simplify

6x - 4y - 12

4 0
4 years ago
Read 2 more answers
In a histogram, are the lengths of the rectangles proportional to the width of the bars?​
Orlov [11]

Answer:

No

Step-by-step explanation:

In different scenarios, the data will be different. However, sometimes, it's impossible to draw a histogram with equal widths, so in order to maintain clarity and fairness, the area of the bars should actually be proportional to the frequency, which is usually the y-axis of the graph or height of the bars.

Hope this helps!

5 0
3 years ago
Read 2 more answers
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