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andrey2020 [161]
3 years ago
8

Can someone please help me with these two questions?

Mathematics
2 answers:
deff fn [24]3 years ago
5 0
1 is b because each meter is 100 centimeters and 42 times 100 is 4200


Anna71 [15]3 years ago
3 0
10. 4,200 cm 
This is the correct answer! 
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Hhhhhhheeeellllpppp mmmmmeeeeee
lora16 [44]
Hey there! I’m happy to help!

The surface area is basically the area of the surface of the shape. So, if you have a cube, it’s the area of all of the surface of the cube, not anything inside.

We see that we have a net of this square pyramid. If we fold it up, the square and four triangles will make up the surface of the 3D shape we see. So, we need to find the area of all of these shapes.

SQUARE
To find the area of a square, you multiply one of the sides by itself (all the sides are the same)

10(10)=100

TRIANGLES
To find the area of a triangle, you take the base and multiply the height and then divide it by two.

10(12)=120
120/2=60
Since we have four triangles, we multiply it by four.
60(4)=240

Finally, we add this all up.

240+100=340

Therefore, the answer is 340 square inches.

I hope that this helps! Have a wonderful day!
7 0
3 years ago
Find the x-intercepts for the parabola defined by the equation below.<br> y=x² + 9x+ 14
Nostrana [21]

Answer:

(-2,0) and (-7,0).

Step-by-step explanation:

Hope this helps!

7 0
3 years ago
Read 2 more answers
20. Simplify: 4×^3√3x+5 ^3√10x
Elenna [48]
5∛(10)∛(x)+4∛(3)<span>∛(x)
But in the comments you wrote the choices and none of them match with the answer i got. so i would say its B</span>
7 0
4 years ago
A survey of 250 homeless persons showed that 14 were veterans. Find a point estimate for the population proportion of homeless p
snow_lady [41]

Answer:

\hat p =\frac{14}{250}= 0.056

And for this case that represent the 5.6% of the homeless persons who are veterans

Step-by-step explanation:

We know that in a survey of 250 homeless persons 14 were veterans. We can find the estimated proportion of homeless persons who are veterans with the following formula:

\hat p =\frac{X}{n}

The last one is an unbiased estimator of the true population proportion p

And replacing the info given we got:

\hat p =\frac{14}{250}= 0.056

And for this case that represent the 5.6% of the homeless persons who are veterans

8 0
3 years ago
What is the answer of equation 9x(30+7)=(9x30)+(9x7)
RSB [31]

(9x30) =270 (9x7)  =63


Distributive Property

5 0
3 years ago
Read 2 more answers
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