3 years ago

I need help with the circled ones

Mathematics

1 answer:

Fantom [35]3 years ago

6 0

For number 7 what is the formula for volume of a cube

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Janette has 386 pennies. 58 nickels and 19 dimes If Janette exchanges her coins for dollars, how many dollars will she have? Ho

svet-max [94.6K]

Answer:

$8 ; 66 cents

Step-by-step explanation:

Given that:

Worth of penny, dimes and Nickel in cents and dollars

Nickel, n = 5 cents = $0.05

Dimes, d = 10 cent = $0.1

Penny, p = 1 cent = $0.01

Multiplying the number of each coin with its respective value ;

386(0.01) + 58(0.05) + 19(0.1)

$3.86 + $2.9 + $1.9

= $8.66

Changing it to dollar ,

$8.66 dollars = 8 dollars ;

$0.66 = 66 cents

6 0

3 years ago

What is the distance between (-9 -3) and (-4 -1)

AnnyKZ [126]

Answer:

|5.385|

Step-by-step explanation:

$\sqrt{((-9)-(-4))^2 + ((-3)-(-1))^2$ =

$\sqrt{(-5)^2 + (-2)^2$ =

$\sqrt{25 + 4$ =

$\sqrt{29$ =

|5.385|

7 0

3 years ago

The potential energy, P, in a spring is represented using the formula P = 1/2kx2. Lupe uses an equivalent equation, which is sol

sukhopar [10]

Answer:

$k=\frac{2P}{x^2}$

Step-by-step explanation:

The formula is $P=\frac{1}{2}kx^2$

<em>We need to solve for $k$ , so we can perform the steps shown below:</em>

$P=\frac{1}{2}kx^2\\P=\frac{kx^2}{2}\\2P=kx^2\\\frac{2P}{x^2}=k$

Hence, the third answer choice is correct.

7 0

3 years ago

Read 2 more answers

Eleanor can drive an average of 374 miles on one tank of gas. How many miles can she drive on 15 tanks of gas?

lidiya [134]

Well you would just multiply 374 by 15 and that would be your answer

8 0

2 years ago

Read 2 more answers

Calculate the length of a triangle if another length is 15 feet and the hypotenuse is 39 feet.

Y_Kistochka [10]

We have to use Pythagorean theorem that says :

$a^2+b^2=c^2\\\Rightarrow a^2+15^2=39^2\\a^2=39^2-15^2\\a=\sqrt{1296}\\a=36$

The missing length of the triangle is : 36 feet

3 0

3 years ago