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3 years ago

Help me solve # 15 & 16

Mathematics

1 answer:

makkiz [27]3 years ago

6 0

Answer:

15) $C=frac{5}{9}(F-32)$

16) 12 hours

Step-by-step explanation:

15) $F=\frac{9}{5}C+32 \\F-32 = \frac{9}{5}C\\\frac{5}{9}(F-32)=C$

16) If Jim drove 168 mi in 4 hours, this means it takes him

$\frac{4 hours }{168 mi}$

this many hours to drive 1 mile. So if we multiply this by 504 mi:

$\frac{4 hours }{168 mi} 504 mi = 4 \cdot 3 hours = 12 hours$

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Fast please!!

Lostsunrise [7]

Answer:

Part 1) The price of a USB memory, stick selling at a 21% discount of its market price (m) ------> 0.79m

Part 2) The price or a CD that sells for 21% more than the amount (m) needed to manufacture the CD -----> 1.21m

Part 3) The final value of a painting after its initial value m, increases by 2/5 -----> $\frac{7}{5}m$

Part 4) The total number of markers that Nancy has if she gives away 2/5 of her m markers to Amy -----> $\frac{3}{5}m$

Step-by-step explanation:

Part 1) The price of a USB memory, stick selling at a 21% discount of its market price (m)

we know that

100% is the market price m

100%-21%=79%

79%=79/100=0.79

The price of a USB memory with a 21% discount of its market price is equal to multiply m by 0.79

(0.79)*m=0.79m

Part 2) The price or a CD that sells for 21% more than the amount (m) needed to manufacture the CD

we know that

100% is the amount m

100%+21%=121%

121%=121/100=1.21

The price or a CD that sells for 21% more than the amount (m) is equal to multiply m by 1.21

(1.21)*(m)=1.21m

Part 3) The final value of a painting after its initial value m, increases by 2/5

we know that

100% is the initial value m

2/5=0.40=40%

100%+40%=140%

140%=140/100=1.4

Convert to fraction

1.4=14/10=7/5

The final value is equal to m multiplied by 7/5

$\frac{7}{5}m$

Part 4) The total number of markers that Nancy has if she gives away 2/5 of her m markers to Amy

we know that

100% is the number of makers m

2/5=0.40=40%

100%-40%=60%

60%=60/100=0.6

Convert to fraction

0.6=6/10=3/5

The total number of markers that Nancy has is equal to multiply m by 3/5

$\frac{3}{5}m$

5 0

3 years ago

The objective is to

ad-work [718]

Answer:

atupagin mo module mo wag puro brainly

5 0

3 years ago

there are 4 swimmers. amy swam 2 more laps than sean. katie swam twice as many laps as sean. tom swam 4 more laps than katie. al

tresset_1 [31]

Answer:

Sean swam 12 laps.

Step-by-step explanation:

Let S represent Sean

Let S+2 represent Amy

Let 2S represent Katie

Let 2S + 4 represent Tom

Now add together and set it equal to 78

S + S+2 + 2S + 2S+4 = 78

6S + 6= 78

6S=72

S=12

8 0

3 years ago

Simplify: 45÷3+2×8-12+42<br><br> Show working

stellarik [79]

15+2*8-12+42
15+16-12+42
31-12+42
19+42
61

3 0

4 years ago

Read 2 more answers

The height, h, in meters above ground, of a projectile at any time, t, in seconds, after the launch is defined by the

Jlenok [28]

Answer:

the projectile reached a maximum height of 27.6 meters in 2.4 seconds and it took 5.0 seconds for it to hit the ground

Step-by-step explanation:

to find the vertex you can find the axis of symmetry first

that equation is -b/2a

-19/-8 = 2.375

then you take this and plug it in

-4(2.375)^2 + 19*2.375 + 5

that gives you 27.5625

then you have to find when it hits the ground

you can factor to find this out

-4t^2 + 19t + 5

4t^2 - 19t - 5

4t^2 + t - 20t - 5

t(4t + 1) -5(4t +1)

(t - 5)(4t + 1)

t = {5, -1/4}

we can only take positive time so it took 5 seconds

the answer is the second one

5 0

2 years ago