2 years ago

Simplify 2b –7+3b+4 –b+3.

Mathematics

2 answers:

madam [21]2 years ago

7 0

Answer:

rjkz [21]2 years ago

5 0

Answer:

Step-by-step explanation:

2b+3b-b -7+4+3

(real numbers cancel eachother out)

left with 4b

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the length of a rectangle is 6in.more than than its width .Its area is 50 sq.in Find the width of the rectangle....

yulyashka [42]

L=6+W
A=LW
sub 6+W for L
A=(6+W)(W)
expand
oh, A=50
50=W²+6W
minus 50 both sides
0=W²+6W-50
we gots to use quadratic formula
for
aW²+bW+c=0
W= $\frac{-b+/- \sqrt{b^2-4ac} }{2a}$
we got
a=1
b=6
c=-50

W= $\frac{-(6)+/- \sqrt{(6)^2-4(1)(-50)} }{2(1)}$
W= $\frac{-6+/- \sqrt{36+200} }{2}$
W= $\frac{-6+/- \sqrt{236} }{2}$
W= $\frac{-6+/- 2\sqrt{59} }{2}$
W= $-3+/- \sqrt{59}$

W= $-3+ \sqrt{59}$ or W= $-3- \sqrt{59}$
aprox
W=-10.6811 or W=4.68115
can't be negative width

width=4.68115 or -3√59

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2 years ago

What is. C(3a+b) and what does it equal to

11Alexandr11 [23.1K]

It equals 3a(c)+b(c)

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3 years ago

Diana works at a clothing store. she sold 1/5 of the total number of green shirts on Monday and 3/12 of the total number of gree

Doss [256]

Answer:

Step-by-step explanation:

3/12 really is 1/4 (Divide top and bottom by 3) 3/3 = 1 and 12/3 = 4