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ivolga24 [154]
2 years ago
9

Help me please someone!!! asap

Mathematics
2 answers:
iragen [17]2 years ago
5 0
It’s A, you need to make sure that you’re dividing what’s in the parenthesis and make sure that 3 gets divided into it as well and the 21:-6 is above a division line with three underneath
beks73 [17]2 years ago
3 0

Answer:

I think the answer is A

Step-by-step explanation:

First you would need to subtract 21 and 6, and then divide the difference of that by 3

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In the equation b= a-2, which is the independent variable and which is the dependent variable ? Explain???? need help i don't un
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A test for marijuana usage was tried on 200200 subjects who did not use marijuana. the test result was wrong 77 times.
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5 0
3 years ago

zhuklara [117]

Step-by-step answer:

Given:

A triangle

Perimeter  = 60 cm

longest side = 4* shortest side (x)

Solution:

longest side = 4x

shortest side = x

third (intermediate side = 60 -x -4x = 60-5x

The triangle inequality specifies that the sum of the two shorter sides must be greater than the longest side to form a triangle.  Hence

x + y > 4x

x + 60-5x > 4x

60 - 4x > 4x

8x < 60

x < 60/8 = 7.5, or

x < 7.5

Therefore to form a triangle, x (shortest side) must be less than 7.5 cm.

Examine the options: both 7 and 5 are both less than 7.5 cm.

40, 30 and 25 all have a problem because the longest side (4 times longer) will exceed the perimeter of 60.

Now also examine cases where 4x is NOT the longest side, in which case we need

4x>=y

or

4x >= 60-5x

9x >=60

x >= 6.67

so x=5 will not qualify, because 4x will no longer be the longest side.

The only valid option is x=7 cm

The side lengths for x=7 and x=5 are, respectively,

(7, 25, 28)

5, 20, 35  (in which case, the longest side is no longer 4x=20, so eliminated)

7 0
3 years ago
Evaluate. F(x)=3x-4;f(-2)
Step2247 [10]
F(x)= 3(-2)-4
F(x)=-6-4
F(x)=-10
8 0
3 years ago
Read 2 more answers
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