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masya89 [10]
3 years ago
13

Can anyone help me I don't know how to solve this?

Mathematics
1 answer:
soldi70 [24.7K]3 years ago
3 0
Set up a proportion. 6/10 = 9/x. cross multiply so x times 6 = 6x. And 10 times 9 = 90. so 6x=90. Then 90 and 6x divided by 6. which gets you x=15. The 9 ft tall elephant will cast a 15 ft shadow.
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Simplify the following expression: (5x2 + 3x + 4) − (2x2 + 5x − 1). If the final answer is written in the form Ax2 + Bx + C, wha
algol13

Answer:

A = 3

Step-by-step explanation:

Given

(5x² + 3x + 4) - (2x² + 5x - 1)

Remove the parenthesis from the first and distribute the second by - 1

= 5x² + 3x + 4 - 2x² - 5x + 1 ← collect like terms

= 3x² - 2x + 5

In the form Ax² + Bx + C

with A = 3

7 0
3 years ago
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Answer:

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Area of a thrombus

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3 years ago
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Vika [28.1K]
Hello,

y=2xe^x
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y''=2(e^x+(x+1)e^x)=2(x+2)e^x

x     |-infinite   -2  0    +infinite
e^x | ++++++++++++++++++
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y''<0 if x<-2
<span>The interval on which the graph is concave down is (-infinite -2[</span>

7 0
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7.5 xxx. 8.0 xxx 8.5 xxx 9.0 xxxxx 9.5 xxxx

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