4 years ago

I still cant figure it out . ughh −2∣5w−7∣+9=−7

Mathematics

2 answers:

Fofino [41]4 years ago

3 0

W=3,-1/5 is the answer

Leviafan [203]4 years ago

3 0

Subtract 9 from both sides
Divide by -2
Split absolute value into 5w+7 and 5w-7
Then solve for w
There are 2 answers

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Each cone of the hourglass has a height of 18 millimeters . the total height of the sand within the top portion of the hour glas

statuscvo [17]

Let

Vco------------------- >Volume cone
Vcy------------------ >Volume cylinder
r= 8mm
hco----------- > height of cone=18 mm
hcy------------ > height of cylinder =54-18=36 mm

then

Vco=π*r² *hco/3--------- > π*8² *18/3=π*384 mm³
Vcy=π*r² *hcy--------- > π*8² *36=π*2304 mm³

the total cubic millimeters of sand=Vco+Vcy=π*384+π*2304=π*2688

if 10π cubic millimeters --------------------- > 1 seg
π*2688--------------------------------- X

X=π*2688/10π=268.8 seg

the answer is 268.8 seg

5 0

3 years ago

Please help! I need to figure out how to do this

Nadusha1986 [10]

This is simple, what is the total degree of a triangle? 180
so add up 70 + 30 is 100, the answer to x is 80

7 0

3 years ago

Did I solve correctly?

faust18 [17]

$5 {x}^{2} + 536 = 651 \\ 5 {x}^{2} = 651 - 536 =115 \\ {x}^{2} = \frac{115}{5} = 23 \\ x = + - \sqrt{23} = + - 4.79$