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3 years ago

Please help with this math problem

Mathematics

2 answers:

stepladder [879]3 years ago

6 0

Answer:

-15

Step-by-step explanation:

Given:

x=-7
-14+7=x+8

Simply plug in and see if the statement is true. If not, isolate x.

Test for truth:

-14+7=-7+8
-7=1
NOT true.

Isolate x in original equation:

-14+7=x+8
-14+7-8=x
-7-8=x
-15=x

pantera1 [17]3 years ago

4 0

B. X=-15

Step-by-step explanation:-14+7=-7 and -15+8=-7

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The cost of a lack has increased by 30% to £65. Work out the original price

Sveta_85 [38]

Cost of lack increased by 30%

new cost of lack will be = 100% + 30% = 130%

We are given that new cost = £65

Thus 130% of original cost = 65

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Thus original price was £50

7 0

3 years ago

What is the approximate distance between points A and B?

Aleks04 [339]

Answer:

$\displaystyle d \approx 7.62$

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Algebra II

Distance Formula: $\displaystyle d = \sqrt{(x_2-x_1)^2+(y_2-y_1)^2}$

Step-by-step explanation:

Step 1: Define

Find points from graph.

Point A(1, 4)

Point B(-2, -3)

Step 2: Find distance d

Simply plug in the 2 coordinates into the distance formula to find distance d

Substitute in points [DF]: $\displaystyle d = \sqrt{(-2-1)^2+(-3-4)^2}$
(Parenthesis) Subtract: $\displaystyle d = \sqrt{(-3)^2+(-7)^2}$
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andrey2020 [161]

Answer:

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Step-by-step explanation:

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3 years ago

F(x)=x^2+8x-10 find f(a)+5

Papessa [141]

Answer:

We conclude that:

f(a) + 5 = a² + 8a - 5

Step-by-step explanation:

Given

The function is given by

f(x) = x²+8x-10

To determine

f(a)+5

In order to determine f(a)+5, first, we need to determine f(a).

Now substitute x = a in the function f(x) = x²+8x-10

f(a) = (a)² + 8(a) - 10

f(a) = a² + 8a - 10

Thus,

f(a) + 5 = (a² + 8a - 10) + 5

f(a) + 5 = a² + 8a - 5

Therefore, we conclude that:

f(a) + 5 = a² + 8a - 5

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