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Natasha2012 [34]
3 years ago
9

I need help with Algebraic expressions for each statements!!

Mathematics
1 answer:
irina [24]3 years ago
6 0

Answer:

d= im not sure/ sorry

a= three times a number equals nine

b= fifteen divided by a number equals three

c= a number minus six equals thirteen

d= twenty four times a number equals five hundred fifty-two

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the weight of a nickel is 80% of the weight of a quarter.if a nickel weighs 5grams how much does a quarter weigh?
Rasek [7]
Just divide 100% by 80% and multiply that answer by 5. I'm pretty sure that's how you do it.
8 0
3 years ago
It takes 124 minutes to lift 4 tires on to a lorry how long would it take him to fit 6 tires in a lorry
Blizzard [7]

Answer:186

Step-by-step explanation:

you divide 124 by 2 and you just add the half to 124.

6 0
3 years ago
Which one is this answer if you are good a math
Alex73 [517]

a=\dfrac{2d}{t^2}\ \ \ \ \ |\text{solve for t} \\ \\\\\dfrac{2d}{t^2}=\dfrac{a}{1}\ \ \ \ \ |\text{cross multiply}\\\\at^2=2d\ \ \ \ \ |:a\\\\t^2=\dfrac{2d}{a}\to t=\sqrt{\dfrac{2d}{a}}\\\\\text{We have}\\ \\a=2\dfrac{m}{s^2},\ d=10m\\\\\text{substitute}\\\\t=\sqrt{\dfrac{2\cdot10m}{2\frac{m}{s^2}}}=\sqrt{10m\cdot\dfrac{s^2}{m}}=\sqrt{10s^2}=\sqrt{10}\ s\\\\Answer:\ C.\ \sqrt{10}\ seconds

4 0
3 years ago
I need help with math please help me!​
VladimirAG [237]

Answer:

9.55 cm

Step-by-step explanation:

The circumference is also called the perimeter, which is the length of the outline of any shape.

So,

Perimeter = \pi *diameter\\30 cm = \pi * d\\\\d = \frac{30}{\pi} cm\\\\d=9.54929658551\:cm\\d=9.55\:cm

7 0
2 years ago
If x = 2 and y = -3, what is the value of 2x^2−3xy−2y^2<br> HELPPP
oksano4ka [1.4K]

Answer:

8

Step-by-step explanation:

2(2)^2‒3(2*‒3)‒2(‒3)^2

2*4‒3(‒6)‒2(9)

8‒(‒18)‒18

8+18‒18

26‒18

8

i think it is easy to understand &i hope it will helps you

8 0
2 years ago
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