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3 years ago

Round to the nearest tenth :)

Mathematics

1 answer:

Scorpion4ik [409]3 years ago

8 0

Good morning

Answer:

Surface area (rounded to the nearest tenth) = 193.3 in²

Step-by-step explanation:

Surface area of this prism = 2×(base’s area) + lateral area

base’s area = (1.9 × 7)/2 = (1,9×7)÷2 = 6.65

lateral area = 12×(7+3+5) = 180

then

Surface area of this prism = 2×(base’s area) + lateral area

= 2×(6.65)+180

= 193.3

________________________

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Solve x2 + 2x + 9 = 0

Keith_Richards [23]

$x^2+2x+9=0 \\ \\
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3 years ago

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11 more than four times a number is 39

Aliun [14]

Hello!

Your answer is: 7

(X = "A number")

"11 more than four times a number is 39" in equation form is: 4X + 11 = 39

to solve, first subtract 11 from both sides:

4X = 28

then divide both sides by 4 to get:

X = 7

I hope this helps, and have a nice day!

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4 years ago

Need help with number 5

tangare [24]

Answer:

(3) y = 4x

Step-by-step explanation:

In order for the equation not to change, the point (0, 0) must be on the original line and so on the line after dilation. The only equation with (0, 0) as a point on the line is y=4x.

Dilation about the origin moves all points away from the origin some multiple of their distance from the origin. If a point is on the origin, it doesn't move. We call that point the "invariant" point of the transformation. For the equation of the line not to change, the invariant point must be on the line to start with.

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3 years ago

(Before you answer I am looking for how I do it. I have the answers but I need to know an equation to do this instead of using l

Tema [17]

Answer:

14 and 16.

Step-by-step explanation:

We know that two consecutive even numbers is 30.

Let's let n be any number.

Then the first even number must be 2n.

This is because n can be any number, either even or odd. However, if we multiply it by 2, this ensures that 2n is even. Remember that any number multiplied by 2 yields an even number.

Therefore, the consecutive even number will be (2n+2). Not (2n+1), because that gives an odd number.

We know that they sum to 30. So, we can write the following equation.

$(2n)+(2n+2)=30$