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Ratling [72]
2 years ago
12

Which expressions have a value of 128 when x = 4? Type your answer

Mathematics
1 answer:
IrinaVladis [17]2 years ago
3 0
32 Is the answer simple division
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OH MY GOSH PLEASE HELP ME PLEASE HELP ME I KNOW YHIS IS EASY BUT IM STUPID AND I DONT KNOW HOW TO DO IT THANKS IF YOU ANSWERED (
ale4655 [162]
I will help you on two conditions:  1) that you never again call yourself "stupid," and that you ask no more than 1 or 2 questions per post.

I'll focus on #5.  Recall that distance = rate times time:  d = r*t.

You want distance and are given rate and time:  rate 1.8 km/min; time 48 min.

I see you write "distance" next to "1.8 km;" that is not correct, because

the problem states that "the rate is 1.8 km per minute."  1.8 km is a distance; 1.8 km / min is not (it's a rate).

So, again, to find the distance traveled, mult. the rate by the elapsed time:
 
distance = (1.8 km/min)(48 min) = 86.4 km, or about 54 miles. 
3 0
3 years ago
Read 2 more answers
15. The sum of two numbers is 8. The difference of the two numbers is 2.
matrenka [14]

Answer:

3 AND 5

Step-by-step explanation:

LET THE TWO NUMBERS BE X AND Y

THEN

X + Y = 8 …….1

X – Y = 2 …… 2

WE SOLVE SIMULTANOUSLY  

SUBTRACTNG EQATION 2 FROM 1

X – X  + Y – (-Y) = 8 – 2

Y + Y = 6

2Y = 6

DIVIDING EACH TERM BY 2

2Y/2 = 6/2

Y = 3

THEN PUTTING Y = 3 IN EQUATION 1

X + 3 = 8

X = 8 – 3

X = 5

5 0
3 years ago
Study the triangle what can you conclude about the angle measures
lyudmila [28]
If 30 60 90 right triangle then ratio of short leg : long leg : hypotenuse = a : a√3 : 2a

in this case

short leg = 4
long leg = 4√3 (short leg times √3)
and
hypotenuse = 8 (twice of short leg)

so answer is A.
The angle measures are 30, 60 and 90
5 0
2 years ago
Read 2 more answers
What is sum of 12- 5 i and -3 +4
vesna_86 [32]

Answer:

Sum- 13 - 5 i

8 0
3 years ago
The variables y and x have a proportional relationship, and y = 15 when x = 3. What is the value of x when y = 4?
madam [21]

answer:

y = 19.2 when x = 8


So the answer is 8




8 0
3 years ago
Read 2 more answers
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