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3 years ago

Pleaseee help i’m literally dying

Mathematics

1 answer:

o-na [289]3 years ago

8 0

Answer:

Step-by-step explanation:

$x^{2} -y^{2}$ = (x + y)(x - y)

So, if x + y = 7/10, and x - y = 5/14, $x^{2} -y^{2}$ = (7/10) * (5/14) = 35/140 = 1/4.

(1/2)^2 = 1/4

So, (B) (1/2)^2 is your answer!

Hope this helps!

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The interest on an investment varies directly as the rate of interest. If the interest is $41 when the interest rate is 4%, fi

VladimirAG [237]

First, find what 41 is 4% of.
$\frac{4}{100} = \frac{41}{x}$
$4x = 4100$
$x = 1025$
Now find 7% of 1025.
$1025(.07) = 71.75$
The interest would be $71.75

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3 years ago

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Math problem help WILL GIVE BRAINLYST 100 PTS

balu736 [363]

Answer:

f(-4) = 1

f(0) = 1

f(1) = - $\frac{3}{2}$

Step-by-step explanation:

1 if x ≤ -2

f(x) = -(x - 1)² + 2 if -2 < x < 1

- $\frac{1}{2}$ x - 1 if x ≥ 1

To find f(-4)

∵ -4 < -2

- That means we will use f(x) = 1 because value of x in this

part is ≤ -2

∴ f(x) = 1

- Substitute x by -4, and remember f(x) = 1 is a constant function

which means the value of y for any value of x is 1

∴ f(-4) = 1

To find f(0)

∵ -2 < 0 < 1

- That means we will use f(x) = -(x - 1)² + 2 because value of x in this

part is between -2 and 1

∴ f(x) = -(x - 1)² + 2

- Substitute x by 0

∴ f(0) = -(0 - 1)² + 2

∴ f(0) = -(-1)² + 2

∴ f(0) = -1 + 2

∴ f(0) = 1

To find f(1)

∵ 1 ≥ 1

- That means we will use f(x) = - $\frac{1}{2}$ x - 1 because value of x in this

part ≥ 1

∴ f(x) = - $\frac{1}{2}$ x - 1

- Substitute x by 1

∴ f(1) = - $\frac{1}{2}$ (1) - 1

∴ f(1) = - $\frac{1}{2}$ - 1

∴ f(1) = - $\frac{3}{2}$

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That would depend on the length and the height

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DedPeter [7]

Answer: 60 students i think

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3 years ago

Solve for x.<br> -4 < 11 - 3.2

goldenfox [79]

Answer:

-4<11-(32/10)

Inequality is always true

Reformatting the input :

Changes made to your input should not affect the solution:

(1): "3.2" was replaced by "(32/10)".

Rearrange:

Rearrange the equation by subtracting what is to the right of the greater than sign from both sides of the inequality :

-4-(11-(32/10))<0

Step by step solution :

Step 1 :

Simplify ——

Equation at the end of step 1 :

-4 - (11 - ——) < 0

Step 2 :

Rewriting the whole as an Equivalent Fraction :

2.1 Subtracting a fraction from a whole

Rewrite the whole as a fraction using 5 as the denominator :

11 11 • 5

11 = —— = ——————

1 5

Equivalent fraction : The fraction thus generated looks different but has the same value as the whole

Common denominator : The equivalent fraction and the other fraction involved in the calculation share the same denominator

Adding fractions that have a common denominator :

2.2 Adding up the two equivalent fractions

Add the two equivalent fractions which now have a common denominator

Combine the numerators together, put the sum or difference over the common denominator then reduce to lowest terms if possible:

11 • 5 - (16) 39

————————————— = ——

5 5

Equation at the end of step 2 :

-4 - —— < 0

Step 3 :

Rewriting the whole as an Equivalent Fraction :

3.1 Subtracting a fraction from a whole

Rewrite the whole as a fraction using 5 as the denominator :

-4 -4 • 5

-4 = —— = ——————

1 5

Adding fractions that have a common denominator :

3.2 Adding up the two equivalent fractions

-4 • 5 - (39) -59

————————————— = ———

5 5

Equation at the end of step 3 :

-59

——— < 0

Step-by-step explanation:

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