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3 years ago

5

A runner 2/3 of a 5 kilometer race in 21 minutes. They ran the entire race at a constant speed. How long did it take to run the

entire race

1 answer:

masha68 [24]3 years ago

7 0

Answer:

ADD DIVIDE MULTIPLY OR SUBTRACT

Step-by-step explanation:

I JUST KNOW

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The height of a square pyramid-shaped gift box is one half the length of

Schach [20]

Answer:

15 inches

Step-by-step explanation:

Volume of a squre based pyramid :

V = a²(h/3)

a = base edge ; h = height

h =1/2 a

V = 4500

4500 = a² * (1/2a) ÷ 3

4500 = a² * a/2 * 1/3

4500 = a³/2 * 1/3

4500 = a³ / 6

27000 = a³

27000 = a³

Take the cube root of both sides

(27000)⅓ = a

30 = a

Recall:

h = 1/2a

h = 1/2(30)

h = 15 inches

5 0

3 years ago

The vertices of a quadrilateral in the coordinate plane are known how can the perimeter of the figure be found

natta225 [31]

Answer:

d

Step-by-step explanation:

6 0

3 years ago

Multiply and give the answer in scientific notation: (2.3 x 10-3)(3 x 108) A) 6.9 x 105 B) 6.9 x 1011 C) 6.9 x 10-5 D) 6.9 x 102

Furkat [3]

Answer: A) is the right answer. $6.9\times10^{5}$

Step-by-step explanation:

Given product : $2.3\times10^{-3}\times3\times10^8$

To multiply above expression, first we need to combine like terms and then we need to use the law of exponents.

$2.3\times3\times10^{-3}\times10^8\\=(2.3\times3)\times(10^{-3}\times10^8)\\=6.9\times10^{-3+8}......[\text{by law of exponents }a^n\cdot\ a^m=a^{m+n}]\\=6.9\times10^{5}$

Thus, the answer is $6.9\times10^{5}$ .

8 0

3 years ago

What is the LCM of 10 and 14

Oduvanchick [21]

The LCM of 10 and 14 is 2.

5 0

3 years ago

Read 2 more answers

According to the Substitution Property of Equality: If y = -5 and 7x + y = 11, then _______ . Question 9 options: 7(-5) + y = 11

ycow [4]

Answer:

7x - 5 = 11

Step-by-step explanation:

To solve for x, substitute y = -5 into the equation 7x + y = 11.

This becomes 7x + (-5) = 11 or 7x - 5 = 11.

7 0

3 years ago