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tankabanditka [31]

3 years ago

13

What is the value of 19 + 5a4 – 3b2 when a = 2 and b = −4?

1 answer:

densk [106]3 years ago

7 0

19 + 5a⁴ - 3b²
19 + 5(2)⁴ - 3(-4)²
19 + 5(16) - 3(16)
19 + 80 - 48
99 - 48
51

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What is the square root of 18 rounded to the nearest tenth

ratelena [41]

Answer: 4.2

Step-by-step explanation:

when you square root 18 you get 4.242. When rounded to the nearest tenth you get 4.2 since 4 is not nor is 5 and exceeds it.

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Classify the polynomial and state the degree. 3y2 - y4 + y5 A) monomial; 5 B) trinomial; 3 C) trinomial; 4 D) trinomial; 5

Ne4ueva [31]

I think the answer is c or d...

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3 years ago

Find two numbers, if Their sum is −7 and their difference is 14

Mademuasel [1]

Let
a------------> first number
b------------> second number

we know that
a+b=-7--------> a=-7-b----------> equation 1
a-b=14--------> equation 2

<span>I substitute 1 in 2
</span>
(-7-b)-b=14-------------> -7-b-b=14----------> -7-2b=14-------> 2b=-7-14
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the answer is
the two numbers are
a=3.5
and
b=-10.5

6 0

3 years ago

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Please help due tonight

Alona [7]

Answer:

n = 13

Step-by-step explanation:

1. (9n-8) and (6n-7) combined equal 180 degrees, and we can translate that into an equation and then solve it: $9n - 8 + 6n- 7 = 180$

2. (Solving)

Step 1: Simplify both sides of the equation.

$(9n+6n)+(-8-7) = 180$
$15n-15=180$

Step 2: Add 15 to both sides.

$15n-15+15 = 180+15$
$15n = 195$

Step 3: Divide both sides by 15.

$\frac{15n}{15} = \frac{195}{15}$
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Therefore, n = 13.

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3 years ago

The number 8 is a perfect 1. Square and cube 2. Cube 3. Square

Sunny_sXe [5.5K]

Answer:

<h2>2. Cube</h2>

Step-by-step explanation:

$8=2\cdot2\cdot2=2^3\\\\\text{It's a perfect cube}$

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