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victus00 [196]
3 years ago
8

Hello can someone please tell me if I did this right please

Mathematics
2 answers:
Scilla [17]3 years ago
4 0

Answer: Double check some of them but other than that you have a few right-

Step-by-step explanation:

maria [59]3 years ago
3 0

Answer:

A. 3

B. 5

C. 1

D. 2

E. 4

Step-by-step explanation:

one way to quickly check your answers is to check for the number lines with a blank hole and one with a coloured in hole. the one with a coloured in hole should be x=<y. the ones with a blank hole should be x<y. (this trick will not completely check for every mistake.)

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slavikrds [6]
So... the radiator has 15 liters of 70% antifreeze.. but needs an 80% antifreeze

well, so, you need to drain some and put some with higher percentage, seems to be, you will end up at the same 15 liters, possible the radiator's capacity, of 80% antifreeze

so, the same amount going out, of 70% is the same amount going in, of 100% antifreeze

now.. let's use the decimal format for the percents, or 70% is 70/100 or 0.7 and so on
\bf \begin{array}{lccclll}&#10;&amount&concentration&&#10;\begin{array}{llll}&#10;concentration\\&#10;amount&#10;\end{array}\\&#10;&-----&-------&-------\\&#10;\textit{70\% sol'n, out}&x&0.7&0.7x\\&#10;\textit{100\% sol'n, in}&x&1.00&x\\&#10;\textit{current 70\% sol'n}&15&0.7&10.5\\&#10;-----&-----&-------&-------\\&#10;mixture&15&0.8&12&#10;\end{array}

so.. let's subtract, from the current solution, 0.7x and add 1x or x, our antifreeze concentration amount, should be 12 though

10.5 - 0.7x + x = 12

solve for "x"

3 0
3 years ago
Read 2 more answers
PLEASE answer! Will give thanks (profile too) and 5-star rating (for sure) BRAINLIEST TOO if I have the option. Please answer. I
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Answer:

148

Step-by-step explanation:

4 0
2 years ago
the riches are ordering topsoil for their new lawn. the topsoil will be spread evenly over the yard before the grass is planted
Alexus [3.1K]
81ft(yd/3ft)*111ft(yd/3ft)*2in(yd/36in)=55.5 yd^3

So 55 1/2 cubic yards of topsoil are needed.
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3 years ago
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tensa zangetsu [6.8K]

a= 92(18) =1656

Area= 1656m


p= 2(92+18) =220

Perimeter= 220m

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3 years ago
Write the equation of a circle in standard form with a diameter whose endpoints are
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X
x {}^{2}  + y {}^{2}  = r {}^{2}
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