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zysi [14]
3 years ago
8

Simplify this expression. (2+3)(5-7)

Mathematics
2 answers:
brilliants [131]3 years ago
7 0

Answer:

-10

Step-by-step explanation:

(2+3)(5-7)

PEMDAS says do what is in the parentheses first

(5) ( -2)

Then multiply the parentheses

-10

Svetradugi [14.3K]3 years ago
4 0

Answer:

-10

Step-by-step explanation:

(2+3)(5-7)

(5)(-2)

5*(-2)

-10

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PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!!
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Answer:

Yes

Step-by-step explanation:

If you graph it... and they intersect there is a sloution.

soloution!:y=0

x=-1.5

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Nalani says the expression 2+5x cannot be factored using the GCF. Is she ​correct? Explain why or why not
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3 years ago
During the assembly of a certain piece of exercise equipment, 3 welds are required during different phases of the assembly proce
Karolina [17]

Answer:

99.9973 %

Step-by-step explanation:

This is a binomial probability distribution.

Since the probability of satisfactory welds = 97% = 0.97 and the probability of defective welds = 3% = 0.03.

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5 0
3 years ago
the height of a triangle is 9m less than its base. the area of the triangle is 56 m^2 find the length of the base (SHOW STEPS)
Veronika [31]
Hey there :)

We know the area formula of a triangle
\frac{1}{2} (base)(height)

We are given:
The area = 56 m²
The base = let p represent this
The height = 9 m less than the base = p - 9

Apply the formula
56 = \frac{1}{2} × ( p ) × ( p - 9 )
56 = \frac{1}{2} × ( p² - 9p )

Divide \frac{1}{2} on both sides
56 ÷ \frac{1}{2} = p² - 9p
112 = p² - 9p

Bring 112 to the other side and equate equation to 0
p² - 9p - 112

Factorise { Sum = -9 , Product = - 112 , therefore suitable factors = - 16 × 7 )
( p - 16 )( p + 7 ) = 0
     ↓          ↓
 p = 16    p = - 7  ←  Reject p = - 7 since length cannot be negative

So, the length  of the base is 16 m

Check:
56 m² = \frac{1}{2} × 16 × ( 16 - 9 )
56 m² = 8 × 7
56 m² = 56 m²
7 0
3 years ago
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