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OLga [1]
3 years ago
9

Sally has 45 balloons. She buys 31 more

Mathematics
2 answers:
stepan [7]3 years ago
8 0

Answer:

76 a

Step-by-step explanation:

spin [16.1K]3 years ago
4 0

Answer:

A. 76 balloons

Step-by-step explanation:

if she starts with 45 and gets 31 more, she's adding the 31 new balloons. so you add 45 plus 31 which makes 76. so the answers A. 76

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Find the area. If applicable, leave the answer in simplest radical form. Helpp​
inna [77]

Answer:

The area is 28\ m^{2}

Step-by-step explanation:

I assume that the figure is a square

The area of a square is equal to

A=b^{2}

where

b is the length side of the square

In this problem we have

b=2(\sqrt{7})=2\sqrt{7}\ m

substitute in the formula

A=(2\sqrt{7})^{2}

A=28\ m^{2}

6 0
4 years ago
Hi i really need help with these 2 questions please!
djyliett [7]

Answer:

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4 0
3 years ago
Read 2 more answers
Which of the following expressions is equal to 3x^2 + 27
Kisachek [45]
Factor: 
3x^2 + 27
= 3(x^2  + 9)
Answer is 3(x^2 + 9), when factored.


A) (3x + 9i)(x + 3i)
= (3x + 9i)(x + 3i)
= (3x)(x) + (3x)(3i) + (9i)(x) + (9i)(3i)
= 3x^2 + 9ix + 9ix + 27i^2
= 27i^2 + 18ix + 3x^2



B) (3x - 9i)(x + 3i)
= (3x +  - 9i)(x + 3i)
= (3x)(x) + (3x)(3i) + ( - 9i)(x) + (- 9i)(3i)
= 3x^2 + 9ix - 9ix - 27i^2
= 27i^2 + 3x^2


C) (3x - 6i)(x + 21i)
= (3x +  - 6i)(x + 21i)
= (3x)(x) + (3x)(21i) + (- 6i)(x) + ( -6i)(21i)
= 3x^2 + 63ix - 6ix - 126i^2
=  - 126i^2 + 57ix + 3x^2






D) (3x - 9i)(x - 3i)
=  (3x +   - 9)(x +  - 3)
= (3x)(x) + (3x)( - 3i) + (- 9)(x) + ( - 9)( - 3i)
= 3x^2 - 9ix - 9x + 27i
= 9ix + 3x^2 + 27i - 9x









Hope that helps!!!

8 0
4 years ago
Read 2 more answers
How many numbers lie between the square of 56 and 57
NARA [144]

Answer:

Given, two numbers 56 and 57 we need to find out the numbers lie between the squares of the given numbers.

Now, we have numbers lying between the square of n and (n + 1) is 2n

⇒ Numbers between squares of 56 and (56 + 1) = 2 × 56 = 112

Hence, 112 numbers lies between the square of the given numbers.

7 0
3 years ago
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Really easy question please help please look at picture
Thepotemich [5.8K]
Answer: D 
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[6.8-7.3]=-0.5
1.5a-0.5
6 0
3 years ago
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