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Murljashka [212]
3 years ago
11

Please helpi will give brainly

Mathematics
1 answer:
VARVARA [1.3K]3 years ago
7 0

Answer:

19.87 ft

Step-by-step explanation:

cross multiply

5/7.8*x/31

31*5=155

7.8*x=7.8x

155/7.8=19.87

x=19.87 ft

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How many solutions does the system x + y = 3 and 2x + 2y = 5 have?
Nataliya [291]
<span>y=-x+5/2..................(2) 
the slopes of equations (10) & (2) are same and the intercepts are different 
so the lines are parallel.
it has no solution </span>
6 0
3 years ago
Read 2 more answers
Conner and Jana are multiplying (3⁵6⁸)(3⁹6¹⁰).
ad-work [718]
<h3>Conner work is correct. Jana work is wrong</h3>

<em><u>Solution:</u></em>

<em><u>Given that,</u></em>

<em><u>Conner and Jana are multiplying:</u></em>

(3^56^8)(3^96^{10})

Given Conner's work is:

(3^56^8)(3^96^{10}) = 3^{5+9}6^{8+10} = 3^{14}6^{18}

We have to check if this work is correct

Yes, Conner work is correct

From given,

(3^56^8)(3^96^{10})\\\\3^5 \times 6^8 \times 3^9 \times 6^{10}

Use the following law of exponent

a^m \times a^n = a^{m+n}

Therefore,

3^5 \times 6^8 \times 3^9 \times 6^{10} = 3^5 \times 3^9 \times 6^8 \times 6^{10} = 3^{5+9} \times 6^{8+10} = 3^{14} \times 6^{18}

<em><u>Given Jana's work is:</u></em>

(3^56^8)(3^96^{10}) = 3^{5.9}6^{8.10} = 3^{45}6^{80}

This is incorrect

The powers of same base has to be added. But here, powers are multiplied which is wrong

7 0
3 years ago
(Factorize): x^2 + 4x + 4 - 9y^2<br>​
aalyn [17]

Answer:

x²^2 + 4x + 4 - 9y²=(x+2-3y) (x+2-3y)

Step-by-step explanation:

hello :

x²+4x+4 = x²+2(2x)+2²=(x+2)²  use identity : (a+b)² = a²+2ab+b²

( x² + 4x + 4) - 9y² = (x+2)²-(3y)²  = (x+2-3y) (x+2-3y)  use identity :

a²-b² =(a-b)(a+b)

3 0
3 years ago
Please help me I will give you the brain thing and extra points. (image below) 4/4
Mama L [17]

Answer:

b

Step-by-step explanation:

cuz trust

5 0
3 years ago
How do I solve this math problem?
notsponge [240]
Teresa had more points because since the fractions are not able to use you can see that 6 is larger than 5
5 0
3 years ago
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