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tangare [24]
2 years ago
15

Help me to solve this please

Mathematics
1 answer:
Leona [35]2 years ago
3 0

Answer:

for this one I think it mostly 3

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2a(5-b)=3b+7 solve for b<br> Step by step
Sidana [21]
<span>2a(5-b)=3b+7

<em>[open bracket]</em>
10a - 2ab = 3b + 7

<em>[solve for b, so we need to move all terms with b to the left]</em>
<em>[-3b on both sides]</em>
10a - 2ab - 3b = 3b + 7 - 3b
10a - 2ab - 3b = 7

<em>[move all those without b to the right]</em>
<em>[-10a on both side]</em>
10a - 2ab- 3b - 10a = 7 - 10a
-2ab - 3b = 7 - 10a

<em>[divide by -1 through to change b to be positive]</em>
2ab + 3b = 10a - 7

<em>[take b out as the common factor]</em>
</span>b(2a + 3) = 10a - 7<span>

<em>[divide by (2a+3) through]</em>
b = (10a -7)/(2a+3)


</span>
4 0
3 years ago
Which of the following is not true?
Gnoma [55]

Answer:

You either wrote it down wrong, or there's a graphic to go along with it that you didn't include. There is not enough information to answer this question, sorry.

6 0
3 years ago
A ​used-boat dealership buys a boat for ​$2800 and then sells it for ​$4000. What is the percent​ increase?
Rudik [331]

Answer:

Step-by-step explanation:

percent increase = increase divided by original number x 100

                           

increase is the difference between the two numbers...

new number - original number.....4000 - 2800 = 1200

percent increase = (1200 / 2800) x 100

                            = 0.42857 (round to .4286) x 100

                             = 42.86 %.....if you need it rounded to the nearest percent, it      would be 43% increase

6 0
3 years ago
Marcie likesto collect stickers, but she also likes to give them away. Currently, Marcy has 87 stickers in her collection. If Ma
puteri [66]
97 would be the answer 5 x 5 = 25 5 x 3 = 15 25-15= 10+87= 97
7 0
3 years ago
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At Glencliff High School, the photography
olga_2 [115]

Answer:

23+12=

Step-by-step explanation:

you just need figure it out in your head and see what sounds right

4 0
3 years ago
Read 2 more answers
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