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3 years ago

Which expression is equivalent to the one below?

Mathematics

1 answer:

Citrus2011 [14]3 years ago

5 0

Answer:

B. $5*\frac{1}{7}$

Step-by-step explanation:

5÷7 is also $\frac{5}{7}$ --that divided sign is what the fractional bar represents in a fraction.

now multiply $5*\frac{1}{7}=\frac{5}{1}*\frac{1}{7}=\frac{5*1}{1*7}=\frac{5}{7}$

both are the same result, so your answer is Choice B.

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Rosa is saving money for a trip. She has already saved 250$ and plans to save $40 per week. This situation can be represented by

Grace [21]

Answer:

After 6 weeks Rosa has saved $490.

Step-by-step explanation:

1. You have the function given in the problem above, where $x$ os the number of weeks:

$f(x)=250+40x$

2. Therefore, to solve this problem you only need to substitute 6 weeks (or $x=6$ ) into the given function, as following:

$f(x)=250+40x\\f(6)=250+40(6)=490$

3. The result is $490.

7 0

3 years ago

The roof rafter of a house has been raised to a height of 13 yards at the ridge. Half of the length of the run measures 9 yards.

dimulka [17.4K]

Answer:

15.81 = ?

Step-by-step explanation:

Since this is a right triangle we can use the Pythagorean theorem

a^2+b^2 = c^2 where a and b are the legs and c is the hypotenuse

9^2 + 13^2 = ?^2

81 +169 = ?^2

250 = ?^2

Taking the square root of each side

sqrt(250) =?

15.8113883= ?

To the nearest 100th

15.81 = ?

3 0

3 years ago

Read 2 more answers

Patrick bought a Discounted pair of tickets to the Yankees game for 1/4 off the Original price. if the tickets costed $200 how m

Soloha48 [4]

Answer:

$50

Step-by-step explanation:

you multiply 1/4 with 200

this results in 50

1/4= .25

.25 x 200 = 50 !!!

7 0

3 years ago

Read 2 more answers

Write a variable expression for the sum of a number w and 2

Eva8 [605]

<span>Write a variable expression for the sum of a number w and 2:

w + 2</span>

4 0

4 years ago

Suppose f(x)={5x7x+c for x≥9, for x<9. In order to make f(x) continuous for all x in (−[infinity],[infinity]), what number sh

love history [14]

Answer:

$c=-18$

Step-by-step explanation:

We have been given a piece-wise function. We are asked to find the value of possible value of c that will make the function continuous for all x in $(-\infty,\infty)$ .

$\left \{ {{f(x)=5x,\text{ for }x\geq 9} \atop {f(x)=7x+c,\text{ for }x>9}} \right.$

We know that a piece-wise function is continuous when right hand side limit is equal to left hand side limit.

To find the value of c that will make function continuous, we need to find the value of c at $x=9$ by equating both side functions as:

$7x+c=5x$

$7(9)+c=5(9)$

$63+c=45$

$63-63+c=45-63$

$c=-18$

Therefore, $c=-18$ will make the function continuous for all x in $(-\infty,\infty)$ .

5 0

4 years ago