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Zolol [24]
3 years ago
9

6n + 8 and 2(3n + 4) Are the two expressions equivalent

Mathematics
2 answers:
lara [203]3 years ago
3 0
Yes, they are equivalent
shepuryov [24]3 years ago
3 0
Yes! if you distribute the two, you’ll see that!
2 x (3n+4) = 6n+8
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Which diagram suggests a correct construction of a line parallel
ser-zykov [4K]
The third diagram is the correct answer.
8 0
3 years ago
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Alexandra has some dimes and some quarters. She has no more than 21 coins worth a minimum of $3.75 combined. If Alexandra has 4
olga55 [171]

Answer:

A minimum of 10 dimes and 11 quarters is what Alexandra will have

Step-by-step explanation:

Let

d = number of dimes

q = number of quarters

Since she has 21 coins altogether,

d + q = 21------------------------equation 1    

  •  If these coins are worth $3.75 then

0.10 x d + 0.25 x q = 3.75

  • which is 0.10d +.25q =3.75 --------------------------equation 2

where $.10 is the value of one dime and $.25 is the value of one quarter

make d the subject of formula from equation 1 d = 21 -q----------equation 3

 insert it in equation 2

0.10d +0.25q =3.75

0.10(21-q) + 0.25q = 3.75

0.1(21)-0.1q+0.25q=3.75

2.1 +0.15q = 3.75

0.15q  = 3.75-2.1 = 1.65

q = 1.65/0.15 =165/15 =11

  • since we have the value of q insert in equation 3

d = 21 - q

d = 21-11

d = 10

Alexandra has 10 dimes and 11 quarters.

from my calculation i can see that the a minimum of 10 dimes and 11 quarters is what Alexandra will have

4 0
3 years ago
at the farmers market 8 apple cost $5.20 if each apple cost the samw amount what is the price per apple
Margaret [11]

\displaystyle\bf Solve:8\times p=5,2 \$ => p=\frac{5,2}{8} =\frac{5,2:\boxed{8}}{8:\boxed{8}}   =0,65\$\quad She \:unit\: cost\:is\:\underline{ 0,65} \\\\Check :\:8\times\underline{0,65} =5,2\$ \\\\0,65=0,65 \\\\\rightarrow The\: price\:per \:apple \:is \: 0,65 \$

7 0
2 years ago
What does -4(3x-4)=44<br> What is x
eduard

Answer:

-7/3

Step-by-step explanation:

6 0
2 years ago
17<br> Write<br> percentage.<br> 20
enot [183]

Answer:

\large \boxed{85\%}

Step-by-step explanation:

17/20

Multiply by the conjugate 5/5.

(17 × 5)/(20 × 5)

85/100

Apply rule : a/100 = a%

85/100 = 85%

5 0
3 years ago
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