What is the value of the expression? 1/4-3/7 times 7/8

A. -1/2

B.-1/8

C. 1/8

D.1/2

NEED HELP FAST!

Answers

Answer 1

Answer: why did u spread that so much

1/4-3/7*7/8 = 1/4 - 3/8 = 2/8 - 3/8 = -1/8

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Gilda walks to the train station. If she walks at the rate of 3 mph, she misses her train by 7 minutes. However, if she walks at the rate of 4 mph, she reaches the station 5 minutes before the arrival of the train. Find the distance Gilda walks to the station.David knew he made a mistake when he calculated that Gilda walks 123 miles to the station. Read through David's calculations:Using d = rt, the distance is the same, but the rate and time are different.If Gilda misses the train, it means the time t needs 7 more minutes so d = 3(t + 7).If she gets to the station 5 minutes early means the time t can be 5 minutes less so d = 4(t - 5).3(t + 7) = 4(t - 5)3t + 21 = 4t - 20t = 41d = rt, so d = 3(41) = 123Find David's mistake in his calculations. In two or more complete sentences, explain his mistake. Include the correct calculations and solutions in your answer.

Answers

We'll represent the distance as d and the time as t.
d= 3(t+7) because Gilda is 7 minutes late when travelling 3 mph
d= 4(t-5) because Gilda is 5 minutes early at 4 mph

d= 3t + 21
d= 4t -20
3t +21 =4t -20
41=t
d= 3(41) +21= 144
The distance is 144 miles.

$d=3(t + 7)\ \ \ if\ Gilda\ walks\ of\ 3mph\n.\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ she\ is\ 7\ minutes\ after\ departure\ of\ the\ train\n\n d= 4(t - 5)\ \ \ if\ Gilda\ walks\ of\ 4mph\ \n.\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ she\ is\ 5\ minutes\ before\ the\ train\ \n\n3(t+7)=4(t-5)\n\n3t + 21 = 4t - 20 \n\nt = 41\ \ \ \Rightarrow\ \ \ d=3(t+7)=3\cdot(41+7)=3\cdot48=144\n\nAns.\ The\ distance\ to\ the\ station\ is\ 144\ miles.$

Add and simplify 9/16 + 1/2= ?

Answers

when adding fractions, they should have the same denominator.
the denominators of the 2 fractions 9/16 and 1/2 are 16 and 2 respectively.
to bring them both to the same denominator we can multiply both numerator and denominator of 1/2 by 8 and we get ---> 8/16.
$(1*8)/(2*8) = (8)/(16)$
then the 2 fractions are 9/16 and 8/16. Now we can add the 2 fractions. when denominator is same the numerator values shoud be added.

$(9)/(16) + (8)/(16) = (17)/(16)$
This is an improper fraction since 16/16 is 1 whole and 1/16 is remaining, simplified fraction = 1 1/16

The addition of $\frac{9}{{16}} +(1)/(2)$ is $\boxed{\frac{{17}}{{16}}}.$

Further explanation:

Given:

The expression is $\frac{9}{{16}} + (1)/(2).$

Explanation:

Consider the first fraction as $\frac{9}{{16}}$ and consider the second fraction as $(1)/(2).$

To add the two fractions first we need to make the same denominator.

The denominator of the first fraction is 16.

The denominator of the second fraction is 2.

Multiply the numerator and denominator of the second fraction by 8.

$\begin{aligned}{\text{Fraction}}&= (1)/(2) * (8)/(8)\n&= \frac{8}{{16}}\n\end{aligned}$

Now the denominator of the second fraction is 16.

The second fraction is $\frac{8}{{16}}.$

Now add the fractions and simply.

$\begin{aligned}{\text{Addition}}&=\frac{9}{{16}} + \frac{8}{{16}}\n&= \frac{{9 + 8}}{{16}}\n&= \frac{{17}}{{16}}\n\end{aligned}$

The simplified or improper fraction of addition can be obtained as follows,

$\begin{aligned}S&= \frac{{16 + 1}}{{16}}\n&=\frac{{16}}{{16}} + \frac{1}{{16}}\n&= 1 + \frac{1}{{16}}\n&= 1\frac{1}{{16}}\n\end{aligned}$

The addition of $\frac{9}{{16}} + (1)/(2)$ is $\boxed{\frac{{17}}{{16}}}.$

Learn more:

1. Learn more about inverse of the functionbrainly.com/question/1632445.

2. Learn more about equation of circle brainly.com/question/1506955.

3. Learn more about range and domain of the function brainly.com/question/3412497

Answer details:

Grade: Middle School

Subject: Mathematics

Chapter: Fractions

Keywords: fraction, simplify, 9/16, 1/2, add, subtraction, denominators, numerators,

PLEASE HELP!! I WILL MARK THE FIRST CORRECT ANSWER BRAINLIEST!!))What is the volume of this cylinder?
Use až 3.14 and round your answer to the nearest hundredth.
11 cm
----
15 cm
cubic centimeters

Answers

Answer:

570 cm³

Step-by-step explanation:

V=πr²h

V= 3.14*11²*15

V= 5699.1

Round answer:

V= 570 cm³

Answer:

Step-by-step explanation:

V=πr2h=π·112·15≈5701.99067

5701.99 is your final answer

Have a nice day:)

Simplify 2m - [n - (m - 2n)].

-3m - n
3m - n
-3m - 3n
3m - 3n

Answers

2m - [n - (m - 2n)]

2m - n + (m - 2n)

2m - n + m - 2n

2m + m - n - 2n

3m - 3n

Answer is D.

Joey and Armando live on the same st as the park. The park is 9/10 mile from Joey's home. Joey leaves home and walks to Armando's home. Then Joey and Armando walk 3/5 mile to the park. Write and solve an equation to find how far Joey walked to get to Armando's home.

Answers

Let's start by assuming Armando's house is between Joey's and the park.

Let $x$ be the distance Joey walked to Armando's house.

The park is 9/10 mile from Joey's home. Joey leaves home and walks to Armando's home. Then Joey and Armando walk 3/5 mile to the park.

$(9)/(10) = x + (3)/(5)$

$x = (9)/(10) - (3)/(5) = (9)/(10) -(6)/(10) = (3)/(10)$

That's probably the answer they're looking for. But what if the park is between Joey and Armando's houses or Joey is between the park and Armando? (The latter isn't really possible with the given distances.)

Let $a, b, c$ be the distances between three collinear points like we have here. Our equation is really a few equations in one, something like

$\pm a \pm b = \pm c$

Let's get rid of the plus/minuses. Squaring,

$a^2 + b^2\pm 2ab = c^2$

$\pm 2ab = c^2-a^2-b^2$

$4a^2b^2 = (c^2-a^2-b^2)^2$

For us, that's a quadratic equation for $c^2$

$4(9/10)^2(3/5)^2= (c^2-(9/10)^2 - (3/5)^2)^2$

I'll skip right to the solutions,

$c^2=(9)/(100) \textrm{ or } c^2=(9)/(4)$

$c=(3)/(10) \textrm{ or } c=(3)/(2)$

We could have gotten the 3/2 just by adding 9/10+3/5 but this was more fun.

4. A video game sells at Arnolds for $14.99. Arnold's marks the game up at 40% of the selling price. What is the cost of the game to Arnold?A. $6.00 B. $9.10 C. $6.50 D. $8.99