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PtichkaEL [24]
3 years ago
8

How do I set up proportion’s and also cross multiply

Mathematics
1 answer:
xenn [34]3 years ago
6 0

Answer:

u transpose all the constans to one side of the '=' sign and solve

Step-by-step explanation:

for example,

in  the first question

the sides of the triangles are proportional then,

25/30 = x/ 10

=> (25x10)/30 = x

=> 250/30 = x

=> 8.33

im pretty sure like this u can do the rest, ;)

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Geoff earns 10% commission on his total sales at work..To pay for a concert ticket, Geoff needs to earn $135 in commission. What
statuscvo [17]

Answer:

$1350

Step-by-step explanation:

Percentage commision earned = 10%

Amount needed to pay for concert = $135

Hence, total sales for the week must be :

Let total sales = x

10% of total sales = $135

10/ 100 * x = $135

0.1x = $135

x = $135 / 0.1

x = $1350

6 0
2 years ago
−4.2(−2.8+4.5)​ I think I know what the answer is but I just want to be 100% sure. Please solve this and tell me your answer. I
Talja [164]

Answer:

-7.14

Step-by-step explanation:

Evaluate

−4.2(−2.8 + 4.5)​

Open parenthesis

(-4.2 * -2.8) + (-4.2 * 4.5)

= (11.76) + (- 18.9)

= 11.76 - 18.9

= -7.14

NOTE:

Negative (-) × negative (-) = positive (+)

Positive (+) × positive (+) = positive (+)

Negative (-) × positive (+) = negative (-)

Positive (+) × negative (-) = negative (-)

7 0
3 years ago
Solve for d.<br><br> 13d + 4 = 43<br><br> A.3<br><br> B.13<br><br> C.39<br><br> D.None of the above
sergejj [24]
Answer is A
Because 43-4=39
39/13=3
6 0
3 years ago
Read 2 more answers
If 6 pounds of apples cost $9, how much would 21 pounds of apples cost?​
bixtya [17]

Answer: it's 31.5

Step-by-step explanation:because you would times 9 by 21 then divide by 6

9*21=189

189/6=31.5

3 0
3 years ago
Read 2 more answers
Which expression would be easier to simplify if used the associative property to change the group.
Norma-Jean [14]

Answer:

{\huge{\pink{\underline{\underline{Answer:}}}}}

Option b is easier to simplify if used the associative property to change the group.

85(120+80)

6 0
3 years ago
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