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MariettaO [177]

3 years ago

6

10 1/8 (3 5/8 + 2 7/8)

1 answer:

Semenov [28]3 years ago

7 0

10 1/8 (3 5/8 + 2 7/8)
10 1/8 (3.625 + 2 7/8)
10 1/8 (3.625 + 2.875)
10 1/8 × 6.5
10.125× 6.5
65.8125

your answer is 65.8125

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4 years ago

The sum of two is 138. One number is 20 less than the other find the numbers

IceJOKER [234]

Answer:

59 and 79

Step-by-step explanation:

59+79=138

59 is 20 less than 79 so it works

8 0

3 years ago

How do you find "a" in -10+a=6a-7a please help I do not know how to find what the answer is.

Sunny_sXe [5.5K]

-10 + a = 6a - 7a

Rearrange the left hand side

a - 10 = 6a - 7a

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4 0

3 years ago

With a detailed explanation from the internet<br> 1/(x-5)+3/(x+2)=4

irga5000 [103]

Answer:

$\boxed{ \sf x=\dfrac{4\pm\sqrt{43}}{2}}$

Explanation:

$\rightarrow \sf \dfrac{1}{x-5}+\dfrac{3}{x+2}=4$

<u>make the denominators same</u>

$\rightarrow \sf \dfrac{1(x+2)}{(x-5)(x+2)}+\dfrac{3(x-5)}{(x+2)(x-5)}=4$

<u>join the fractions together</u>

$\rightarrow \sf \dfrac{x+2+3x-15}{(x-5)(x+2)}=4$

<u>cross multiply</u>

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<u>simplify</u>

$\rightarrow \sf 4x-13=4x^2-12x-40$

<u>group the variables</u>

$\rightarrow \sf 4x^2-16x-27 = 0$

<u>use quadratic formula</u>

$\rightarrow \sf x = \dfrac{-\left(-16\right)\pm \sqrt{\left(-16\right)^2-4\cdot \:4\left(-27\right)}}{2\cdot \:4}$

<u>simplify the following</u>

$\rightarrow \sf x=\dfrac{4\pm\sqrt{43}}{2}$

7 0

2 years ago

Read 2 more answers

Keli and Mario are planning to plant rectangular gardens of the same length, side by side with fencing all around and dividing t

olchik [2.2K]

Answer:

Step-by-step explanation:

Given

Total area of two plot $A=336 ft^2$

Let l and b the length and width of plot

Perimeter for Fencing

$P=3l+4b$

$100=3l+4b-----1$

$A=336=2lb$

$lb=168 ft^2---2$

Put value of b in 1

$4\times \frac{168}{l}+3l=100$

$672+3l^2=100 l$

$3l^2-100l+672=0$

$l=\frac{100\pm \sqrt{100^2-4\times 3\times 672}}{2\times 3}$

$l=\frac{144}{6},\frac{56}{6}$

so there can be two value of l i.e. $24\ ft, 9.33\ ft$

for $l=24\ ft,\ b=7\ ft$

3 0

3 years ago