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blsea [12.9K]
2 years ago
8

2a – 7 + 4b + 7a – b + 4

Mathematics
1 answer:
Contact [7]2 years ago
5 0

Answer:

(2a+7a)+(−7+4)+(4b−b)

9a−3+3b

Brainlist Pls!

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PLEASE HELP ME!!!! PLEASE PLEASE!!! 40 POINTS a rectangular toy box has a length of x + 1 feet a width of 2x - 5 feet if the vol
insens350 [35]

Answer:

the dimensions of the toy box:

Step-by-step explanation:

x+1=2x

2x-5

90

like terms;

- crossing over becomes + and vice versa

soo 2x-2x +90-5

2x^2 cancels it self out leaving 90-5

=85.

5 0
3 years ago
HELP ME AND MAKE IT QUICK PLEASE.
makvit [3.9K]

Answer:

B

Step-by-step explanation:

the sum of angles of triangle=180

B: 50+60+70=180

8 0
3 years ago
What is the area of triangle DEF?
FrozenT [24]

Answer:

A=2\sqrt{14}\ units^2

Step-by-step explanation:

we know that

Heron's Formula is a method for calculating the area of a triangle when you know the lengths of all three sides.  

so

A=\sqrt{s(s-a)(s-b)(s-c)}

where

a, b and c are the length sides of triangle

s is the semi-perimeter of triangle

we have

a=5\ units,b=6\ units,c=3\ units

<em>Find the semi-perimeter s </em>

s=\frac{5+6+3}{2}=7\ units

Find the area of triangle

A=\sqrt{7(7-5)(7-6)(7-3)}

A=\sqrt{7(2)(1)(4)}

A=\sqrt{56}\ units^2

simplify

A=2\sqrt{14}\ units^2

3 0
3 years ago
PLS HELP :(((
Paul [167]
Hey,
So if you are working 8 hrs a day and $15 an hour multiply those together, that would give you $120 a day, and multiplying that by 5 days a week that would make $600 a week.
7 0
3 years ago
I need help for these 2 problems the reason it’s already written is because I got them wrong (20 pts)
lawyer [7]

Answer:

I'm so so sorry but I cant really see what those say... Again, I'm very sorry about this...

Step-by-step explanation:

8 0
2 years ago
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