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Luba_88 [7]
3 years ago
5

Evaluate the expression when a=−15a=−15 and b=−5b=−5. b + 14a=

Mathematics
1 answer:
svetoff [14.1K]3 years ago
5 0
First we substitute the given values into the problem 
so (-5) + 14 (-15)
then do the multiplication
(-5) + -210
now add
-215

Hope this helps :)
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Helppppppp pleaseeeeee
LenKa [72]

Answer:

4

Step-by-step explanation:

5 0
3 years ago
A baker is building a rectangular solid box from cardboard to be able to safely deliver a birthday cake. The baker wants the vol
k0ka [10]

The length of the rectangular delivery box must be equal to 4 inches.

Let the length of the box be L.

Let the width of the box be W.

Let the height of the box be H.

<u>Given the following data:</u>

  • Volume of box = 224 cubic inches.

Translating the word problem into an algebraic expression;

W = 3 + L  ......equation 1

H = 4 + L  ......equation 2.

Mathematically, the volume of a rectangular solid is given by the formula;

Volume = length * width * height  .....equation 3.

Substituting the values into equation, we have;

224 = L * (3 + L) * (4 + L)\\\\224 = (3L + L^{2})* (4 + L)\\\\224 = 12L + 3L^{2} + 4L^{2} + L^{3} \\\\224 = 12L + 7L^{2} + L^{3}

Rearranging the polynomial, we have;

L^{3} + 7L^{2} +  12L - 224 = 0

We would apply the remainder theorem to solve the polynomial.

According to the remainder theorem, if a polynomial P(x) is divided by (x - r) and there is a remainder R; then P(r) = R.

When x = 3

(x - 3) = 0\\x = 3

P(3) = 3^{3} + 7(3^{2}) + 12(3) - 224\\\\P(3) = 27 + 7(9)  + 36 - 224\\\\P(3) = 27 + 63 + 36 - 224 = -98 \neq 0

We would try with 4;

P(4) = 4^{3} + 7(4^{2}) + 12(4) - 224\\\\P(4) = 64 + 7(16)  + 48 - 224\\\\P(4) = 64 + 112 + 48 - 224\\\\P(4) = 224  - 224 = 0

Therefore, 4 is one of its roots.

Hence, the length of the rectangular delivery box must be equal to 4 inches.

Find more information on polynomial here: brainly.com/question/10689855

3 0
3 years ago
Decompose 0.42 into tenths and hundredths
m_a_m_a [10]

Answer:

0.40 + 0.02

Step-by-step explanation:

4 tenths plus 2 hundredths

5 0
3 years ago
Simplify [view attached image]
pav-90 [236]

<u>Given</u>:

The given expression is (\sqrt{5})( \sqrt[3]{5})

We need to simplify the given expression.

<u>Simplification</u>:

Let us simplify the given expression.

Rewriting the given expression, we have;

5^{\frac{1}{2}} \cdot 5^{\frac{1}{3}}

Let us apply the exponent rule \:a^b\cdot \:a^c=a^{b+c}, we get;

5^{\frac{1}{2}+\frac{1}{3}}

Taking LCM, we have;

5^{\frac{3+2}{6}}

Simplifying, we get;

5^{\frac{5}{6}}

Thus, the simplified value of the given expression is 5^{\frac{5}{6}}

Hence, Option a is the correct answer.

6 0
3 years ago
Please show me how to solve this equation step by step!<br> 1/25(20-t)=4/25t-3/5
rjkz [21]

Remark

Multiply both sides of the equation by 25. Then you have an equation that you have already done probably.

Step One

Multiply both sides of the equation by 25

1 * (20 - t) = 4t - (3/5) * 25    Every part of the equation must be multiplied by 25

(20 - t) = 4t - 75/5                 3*25/5 = 75/5

20 - t = 4t - 15                       Add t to both sides

20 - t + t =4t + t  - 15             Combine like terms

20 = 5t - 15                            Add 15 to both sides

20 + 15 = 5t - 15 + 15             Combine like terms  

35 = 5t                                    Divide by 5

35/5 = 5t/5                             Switch sides

t = 7  Answer

5 0
3 years ago
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