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3 years ago

What is the value of the expression? (-4.2)(2)+10

Mathematics

2 answers:

Crazy boy [7]3 years ago

8 0

-8.4+10 = 10 - 8.4 = 1.6

Murljashka [212]3 years ago

7 0

Start with multiplication:
-4.2 x 2 = -8.4 (it stays negative because there is an odd number of negative numbers (the -4.2) being multiplied)
Then you add the product and 10 left:
-8.5 + 10 = 1.5
1.5 is your answer

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Simplify<br><br>Square root of 50 over 2 times -4 + square root of 121

kobusy [5.1K]

Answer:

-9

Step-by-step explanation:

$\sqrt{\dfrac{50}{2}}\cdot(-4)+\sqrt{121}=-4\sqrt{25}+11=-4\cdot5+11\\\\=-20+11=\boxed{-9}$

Your calculator can help with this.

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2 years ago

Can you divide a donut into 5 pieces (doesn't have to be equal)? If so could you explain or draw a diagram. using 2 straight cut

svp [43]

Answer:

Step-by-step explanation:

Its not possible to make 5 pieces with only 2 cuts. Anyway you use your two cuts would not result in 5 pieces

6 0

2 years ago

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Which graph represents the function f(x) = |x + 3|?

Sophie [7]

Answer: (B)
Explanation: If you are unsure about where to start, you could always plot some numbers down until you see a general pattern.

But a more intuitive way is to determine what happens during each transformation.
A regular y = |x| will have its vertex at the origin, because nothing is changed for a y = |x| graph. We have a ray that is reflected at the origin about the y-axis.

Now, let's explore the different transformations for an absolute value graph by taking a y = |x + h| graph.
What happens to the graph?
Well, we have shifted the graph -h units, just like a normal trigonometric, linear, or even parabolic graph. That is, we have shifted the graph h units to its negative side (to the left).

What about the y = |x| + h graph?
Well, like a parabola, we shift it h units upwards, and if h is negative, we shift it h units downwards.

So, if you understand what each transformation does, then you would be able to identify the changes in the shape's location.

6 0

3 years ago

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Metal A has a density of 12.7 g/cm3.

stira [4]

Using the given information, the density of metal B is 8.58 g/cm³

<h3>Calculating density </h3>

From the question, we are to determine the density of metal B

From the given information,

55 g of metal A is combined with metal B to create an alloy with mass 90 g

∴ Mass of metal B in the alloy = 90 g - 55 g = 35 g

Now, we will determine the volume of metal A in the alloy

Using the formula,

Density = Mass / Volume

∴ Volume = Mass / Density

Volume of metal A in the alloy = 55/12.7

Volume of metal A in the alloy = 4.33 cm³

Then, we will determine the volume of the alloy

Volume of the alloy = 90/10.7

Volume of the alloy = 8.41 cm³

∴ Volume of metal B in the alloy = 8.41 cm³- 4.33 cm³

Volume of metal B in the alloy = 4.08 cm³

Now, for the density of metal B

Density = mass / volume

Density of metal B = 35 / 4.08

Density of metal B = 8.58 g/cm³

Hence, the density of metal B is 8.58 g/cm³.

Learn more on Calculating density here: brainly.com/question/13986137

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5 0

2 years ago

In 3 apples cost 48¢ , how many dozen apples can be bougth for $3.84?

Law Incorporation [45]

1 dozen = 12 apples.

3 apples cost 0.48, multiply that by 4 to get the price of 1 dozen.

0.48 x 4 = $1.92 per dozen.

Divide the total you can spend ( 3.84) by cost per dozen:

3.48 / 1.92 = 2

You can buy 2 dozen.

6 0

3 years ago

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