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3 years ago

Which Expression is equivalent to 5−3(4−1)?

Mathematics

1 answer:

Juliette [100K]3 years ago

7 0

Non of the answers are right because the answer should be equivalent to -4

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If each square on the grid represents 5 square feet what is the approximate area of the fish pond

inna [77]

165 square feet, approximately.

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3 years ago

Read 2 more answers

√(11 - 6 √(2))<br> (not decimal form)

bogdanovich [222]

Answer:

$\huge\boxed{\sqrt{11-6\sqrt2}=3-\sqrt2}$

Step-by-step explanation:

$\sqrt{11-6\sqrt2}=(*)\\\\11=9+2=3^2+(\sqrt2)^2\\6\sqrt2=(2)(3)(\sqrt2)\\\\(*)=\sqrt{3^2-(2)(3)(\sqrt2)+(\sqrt2)^2}\\\\\text{use}\ (a-b)^2=a^2-2ab+b^2\\\\=\sqrt{(3-\sqrt2)^2}\\\\\text{use}\ \sqrt{a^2}=|a|\\\\=|3-\sqrt2|=3-\sqrt2\\\\^{\text{because}\ 3>\sqrt2\to3-\sqrt2>0}$

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3 years ago

A hot air balloon descends at a rate of 320 feet per minute for 3 minutes. Use intergers to calculate and represent the balloons

AlladinOne [14]

Descending means that the hot air balloon's height is changing at a negative rate. Multiply the rate of change per minute by the total amount of minutes.

$-320 * 3 = -960$

The total change in altitude is -960 feet.

4 0

3 years ago

Addinfg in scientific notation 9x10^3 +2.3x10^4=

Vladimir [108]

Answer:

3.2 × 10^4

Step-by-step explanation:

Move the decimal so there is one non-zero digit to the left of the decimal point. The number of decimal places you move will be the exponent on the 10 . If the decimal is being moved to the right, the exponent will be negative. If the decimal is being moved to the left, the exponent will be positive.

3.2 × 10 ^4

4 0

3 years ago

What are the solutions to the system of equations?<br><br><br> (_____ , 2) and ( _____ , _____ )

alexandr1967 [171]

Answer:

(1, 2) and (-1, -2)

Step-by-step explanation:

Since y = 2x, the first blank tells you

2x = 2

x = 1

____

Since the variables are squared, a negative solution is as good as a positive solution, so x = -1 and y = -2 will also work.

8 0

3 years ago