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Anna35 [415]
3 years ago
9

Please help asap!!!!

Mathematics
1 answer:
boyakko [2]3 years ago
6 0

Answer:

142 cm

Step-by-step explanation:

7*5 + 7*5 + 3*5 + 3*5 + 7*3 + 7*3

=> 35 + 35 + 15 + 15 + 21 + 21

=> 70 + 30 + 42

=> 100 + 42

=> 142

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2. Graph x < 8 and x > -1.
dimulka [17.4K]

Answer:

I'll try my best in explaining the steps.

Considering both signs are greater than and less than sign, its an open circle.

For the first equation, you would have an open circle, basically one that isn't colored in, on 8 on the number line. The arrow would be pointing to the left because the equation is telling us numbers that are less than 8.

For the second equation, you would have an open circle, basically one that isn't colored in, on -1 on the number line. The arrow would be pointing to the right because the equation is telling us numbers that are greater than -1.

Step-by-step explanation:

7 0
3 years ago
3x to the power of 3 + 21x squared + 36x = 0 by factoring the quadratic equation.
Diano4ka-milaya [45]

Answer:

x = 0, -4 and -3.

Step-by-step explanation:

The given expression is "3x to the power of 3 + 21x squared + 36x = 0".

We can write this expression as follows :

3x^3+21x^2+36x=0

Taking 3x common.

3x(x^2+7x+12)=0\\\\3x=0\ \text{and}\ (x^2+7x+12)=0

x = 3

x^2+7x+12=0\\\\x^2+3x+4x+12=0\\\\x(x+3)+4(x+3)=0\\\\(x+4)(x+3)=0\\\\x=-4,-3

Hence, the solution of the given quadratic equation are x = 0, -4 and -3.

5 0
3 years ago
Aiden is making hot cocoa for his friends each cup of cocoa has 2 marshmallows complete the chart below
Pachacha [2.7K]

Answer:

3,4 for cups of hot cocoa

4 for marshmallows

Step-by-step explanation:

dfggdr

5 0
3 years ago
Read 2 more answers
-6+ (-20) + (-40) + 3d
cupoosta [38]

Answer:

-3(22-d) ?

Step-by-step explanation:

I hope this is right please let me know

8 0
3 years ago
The inequality 7-2/3 < x-8 is equivalent to
inn [45]

X>43/3

Or X>29/3

Depending if you mean (7-2)/3 or 7-(2/3)

5 0
3 years ago
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