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3 years ago

PLZ help me!!!! I have no idea how to do this!

Mathematics

2 answers:

mestny [16]3 years ago

8 0

Answer:

Step-by-step explanation:

d is the answer

sp2606 [1]3 years ago

7 0

Answer:

a) $y^b z^{(b-1)}$

Step-by-step explanation:

Hope this helps :)

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70 POINTS!! AND BRAINLIEST HELPPPPP!!!

DerKrebs [107]

Answer:

3000 girls
38 fishes
37 points
115 marbles
19 gray coloured cars

Step-by-step explanation:

Let the unknown values be x

30 class mates = 1 class room

18 girls in 1 classroom

18 girls in 30 classmates

x girls in 5000 class mates

$18\:girls= 30\:students\\x\:girls = 5000\:students\\\\Cross\:Multiply\\\\30x = 90000\\\\Divide\:both\:sides\:by\:30\\\frac{30x}{30} = \frac{90000}{30}\\ \\x = 3000\\= 3000 girls$

$2.5\:miles = 12 \:fishes\\8\:miles = x\:fishes\\\\Cross\:Multiply\\2.5x = 96\\\\Divide\:both\:sides\:of\:the\:equation\:by\:2.5\\\\\frac{2.5x}{2.5}=\frac{96}{2.5}\\ \\x = 38.4\\Approximately \: =38\:fishes$

$8\:minutes = 14\: points\\21 \:minutes = x \:points\\\\Cross\:Multiply\\8x = 294\\\\\mathrm{Divide\:both\:sides\:by\:}8\\\frac{8x}{8}=\frac{294}{8}\\\\Simplify\\x=\frac{147}{4}\\\\x = 36.75\\\\Approximately\:= 37\:points$

$32\:marbles = 5\:inches\\x\:marbles = 18\:inches\\\\Cross\:Multiply\\5x = 576\\\\\mathrm{Divide\:both\:sides\:by\:}5\\\frac{5x}{5}=\frac{576}{5}\\\\x=\frac{576}{5}\\\\x =115.2\\= 115=\:marbles$

$2 \: gray\:colour= 15\:cars\\x\:gray= 140\:cars\\\\Cross\:Multiply\\\\15x = 280\\\\\mathrm{Divide\:both\:sides\:by\:}15\\\frac{15x}{15}=\frac{280}{15}\\\\Simplify\\x=\frac{56}{3}\\\\x =18.666\\Approximately ;\\19$

6 0

4 years ago

Read 2 more answers

Quadrilateral ABCD is inscribed in this circle.

Sedbober [7]

The answer to this is 65.

Remember that the angles opposite of each other equal to 180. So a+c=180 and b+d=180.

First, we solve for x. Since we know that b and d equal to 180, we subtract 148 from 180.
180-148=32. x=32.

Then we plug that in the expression for angle a.
2x+1 becomes 2(32)+1
2*32=64
64+1=65.
a=65

4 0

3 years ago

A ball is thrown straight up from the roof of an 80-foot building and it's height is modeled by the h(t) = â17t2 + 68t + 80, whe

Rasek [7]

Answer:

t = 4

Step-by-step explanation:

Given that:

$h(t) = 17t^2 + 68t + 80$

When h(t) = 80, we have that:

$80 = -17t^2 + 68t + 80\\\\=> 0 = -17t^2 + 68t\\\\=> 17t^2 - 68t= 0\\\\=> 17t(t - 4) = 0\\\\=> t = 0, t = 4\\\\$

t = 0 represents when the ball has not been thrown at all, in its initial position.

t = 4 represents the time taken for the ball to hit the roof of the building on its way down.

Hence, our answer is t = 4. (t is in secs)

7 0

3 years ago

Read 2 more answers

How it’s worded is confusing me...

Sergeu [11.5K]

So u hav two numbers one is the multiple of another (so like 2 and 4) ( it can go into the other number) then the least common multiple of the other
I think an answer would be if u do 2 and 4 the LCM would be 2 (don’t know if I’m right not sure about my LCM)

3 0

3 years ago

B. Antonia's blue rope measures 2 yards. She wants to cut the rope into MORE than 3 pieces so all the pieces of rope are equal i

fredd [130]

Answer:

4 18 inch pieces

Step-by-step explanation:

multiply 6 •12 and divide 72 by 4

6 0

3 years ago

Read 2 more answers