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2 years ago

As an estimation we are told 5 miles is 8 km. Convert 68 km to miles.

Mathematics

1 answer:

ArbitrLikvidat [17]2 years ago

8 0

Answer:

42 miles

Step-by-step explanation:

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Rewrite: 72x3/4 please show how you got answer

Alex_Xolod [135]

We have been given the expression

$72 \times \frac{3}{4}$

We can rewrite the expression as $\frac{72\times 3}{4}$

In order to simplify the given expression, we can check if we have any common terms in the numerator and denominator.

We can write the term 72 which is in the numerator as $18\times 4$

Thus, the expression becomes

$\frac{18\times 4\times 3}{4}$

We can see that 4 is common in both numerator and denominator. Hence, we can cancel 4. Thus, we are left with

$18 \times 3\\
=54$

Therefore, we can rewrite the given expression as 54.

8 0

3 years ago

There is 6 7/8 cups now i take 2 5/8 away how many is left ?

REY [17]

left means subtracting

6 7/8 - 2 5/8

Whole numbers subtract each other

Numerators subtract each other

The denominators stay the same.

6-2= 4

7-5=2

4 2/8

Reduce 2/8. Divide by 2. 2/2= 1, 8/2= 4

4 2/8=4 1/4

Answer: 4 2/8 = 4 1/4 cups left

3 0

3 years ago

Read 2 more answers

Solve the system by substitution!

irga5000 [103]

When solving by substation the answer would be: X= 1 , y= 5

3 0

2 years ago

The sum of three numbers is 8. The third is 9

Ierofanga [76]

Answer:

→ First value is 1

→ Second value is 2

→ Third value is 5

Step-by-step explanation:

• let numbers be x, y and z

${ \tt{z = 8y - 9 - - - (eqn \: 1)}} \\ \\ { \tt{10x = 8y - 7 - - - (eqn \: 2)}} \\ \\ { \tt{x + y + z = 8 - - - (eqn \: 3)}}$

• from eqn 2, make x the subject:

${ \tt{x = \frac{8y - 7}{10} }} \\$

• substitute all variables in eqn 3:

${ \tt{ \frac{8y - 7}{10} + y + 8y - 9 = 8}} \\ \\ { \tt{8y - 7 + 10y + 80y - 90 = 80}} \\ \\ { \tt{98y = 177}} \\ \\ { \boxed{ \tt{ \: y = 1.8}}}$

• find z

${ \tt{z = 8y - 9}} \\ \\ { \tt{z = 8(1.8) - 9}} \\ \\ { \tt{z = 14.4 - 9}} \\ \\ { \boxed{ \tt{ \: z = 5.4 \: }}}$

• find x:

${ \tt{x = \frac{8(1.8) - 7}{10} }} \\ \\ { \tt{x = \frac{7.4}{10} }} \\ \\ { \boxed{ \tt{ \: x = 0.74 \: }}}$

Rounding to nearest value:

${ \boxed{ \rm{x = 1}}} \\ { \boxed{ \rm{y =2 }}} \\ { \boxed{ \rm{z = 5}}}$

7 0

2 years ago

Which does NOT represent a function a b c d

mote1985 [20]

the answer is d
hope this helps

6 0

2 years ago