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Naddika [18.5K]
3 years ago
12

(01.06 MC) Jonna is 4 years older than her brother. Which of the following expressions shows the sum of their ages if b represen

ts Jonna's brother's age? (2 points) 2b + 4 b + 4 2(b + 4) 4b
Mathematics
1 answer:
Lana71 [14]3 years ago
6 0
Your equation will be: b+4
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Can someone plz help me
andre [41]
Uh the answer is        y=10
8 0
3 years ago
Read 2 more answers
A rectangular parcel of land is 70 ft longer than it is wide. Each diagonal between opposite corners is 130 ft. What are the dim
Bingel [31]
We have the following dimensions:
w=wide
w+70=length

We have a right triangle:
leg₁=w
leg₂=w+70
hypotenuse=130

Pythagoras theorem:
leg₁²+leg₂²=hypotenuse²
Then:

w²+(w+70)²=130²

We have to solve that equation:
w²+(w+70)²=130²
w²+w²+140w+4900=16900
2w²+140w+4900-16900=0
2w²+140w-12000=0
(2w²+140w-12000)/2=0/2
w²+70w-6000=0

w=(-70⁺₋√(4900+24000)) / 2
=(-70⁺₋170) / 2
We have two possible solutions:
Solution 1

w=(-70-170)/2=-120   (this solution is not possible because the result is negative and it have no sense in this problem).

Solution 2

w=(-70+170)/2=50  (this is the right solution)

w=50
w+70=120

ANSWER:  the length would be 120 u  (u=units of length ) and the wide would be 50 u.
5 0
3 years ago
-7(-3x + 2)
vichka [17]

Answer: 2/3

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
Help me asap!!! :) please<br><br><br> Mark you a brainly!
Margaret [11]

30 /10 = 3

 so multiply 9 by 3

9*3 = 27

9/10 = 27/30

a = 27

5 0
3 years ago
If an 8 hour work day includes a total break time of 22 1/4%, how many hours are used for breaks?
torisob [31]

Answer:

1 39/50 hours. This is equivalent to 1.78 hours.

Step-by-step explanation:

The sum of the hours of work and the hours for break gives the work day hour which has been given as 8 hours.

Furthermore, given that the break time is 22 1/4%, the number of hours for break

= 22 1/4% × 8 hours

= 89/400 × 8

= 1 39/50 hours

4 0
3 years ago
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