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2 years ago

PLESE HELP ILL GIVE BRAINLIEST!,!!!!!

Mathematics

2 answers:

Bogdan [553]2 years ago

5 0

Answer:

9.8x + 1.1y + 9.9z

Step-by-step explanation:

$\textsf {The perimeter is the sum of the side lengths.}$

$\textsf {Hence, the perimeter is :}$

⇒ 5.5x + 6.2y + 4.3x + 8.3z + 1.6z - 5.1y

⇒ 9.8x + 1.1y + 9.9z

Tasya [4]2 years ago

5 0

Answer: C) 9.8x + 1.1y + 9.9z

Step-by-Step Explanation:

Perimeter = Side + Side + Side

Therefore,
= 5.5x + 6.2y + 4.3x + 8.3z + 1.6z - 5.1y
= (5.5 + 4.3)x + (6.2 - 5.1)y + (8.3 + 1.6)z
= 9.8x + (6.2 - 5.1)y + (8.3 + 1.6)z
= 9.8x + 1.1y + (8.3 + 1.6)z
=> 9.8x + 1.1y + 9.9z

Perimeter = 9.8x + 1.1y + 9.9z cm

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: Diego is collecting dimes and nickels in a jar. He has collected $22.25 so far. The relationship between the numbers of dimes

Troyanec [42]

Answer:

A. (0,445)

D.(118,209)

E.(172,101)

Step-by-step explanation:

The equation that we have in this problem is:

$0.10d + 0.05n = 22.25$

where

d is the number of dimes

n is the number of nickels

$22.25 is the total amount of money collected by Diego in the jar.

In order to find which pairs of values can be solutions to the equation, we just need to substitute each pair (d,n) into the left term on the equation, and check if the result is 22.25. Let's do it:

A. (0,445)

$0.10\cdot 0 + 0.05\cdot 445 =0+22.25=22.25$ --> YES

B. (0.50,435)

$0.10\cdot 0.50 + 0.05\cdot 435 =0.05+21.75=21.80$ --> NO

C. (233,21)

$0.10\cdot 233 + 0.05 \cdot 21 =23.3+1.05=24.35$ --> NO

D.(118,209)

$0.10\cdot 118 + 0.05\cdot 209 =11.8+10.45=22.25$ --> YES

E.(172,101)

$0.10\cdot 172 + 0.05\cdot 101 =17.2+5.05=22.25$ --> YES

So the correct pairs are:

A. (0,445)

D.(118,209)

E.(172,101)

3 0

3 years ago

In right triangle LMN, L and M are complementary angles and sin(L) is 19/20. What is cos(M).

Juliette [100K]

Option A:

$$\cos M=\frac{19}{20}$

Solution:

The image of the triangle is attached below.

Given data:

$$\sin L=\frac{19}{20}$

Using trigonometric ratio formulas,

$$\sin L=\frac{\text { Opposite side of } L}{\text { Hypotenuse }}$

$$\sin L=\frac{MN}{LM}$

So, MN = 19 and LM = 20

Using Pythagoras theorem,

In right triangle, square of the hypotenuse is equal to the sum of the squares of the other two sides.

$LM^2=LN^2+MN^2$

$20^2=LN^2+19^2$

$400=LN^2+361$

Subtract 361 from both sides,

39 = LN²

Taking square root on both sides,

$LN=\sqrt{39}$

$$\cos \theta=\frac{\text { Adjacent side of } \theta}{\text { Hypotenuse }}$

$$\cos M=\frac{\text { Adjacent side of } M}{\text { Hypotenuse }}$

$$\cos M=\frac{MN}{LM}$

$$\cos M=\frac{19}{20}$

Hence option A is the correct answer.

7 0

4 years ago

What is the inverse function f(x)=2x +1

Neko [114]

The inverse function is f(x) = $\frac{x - 1}{2}$

You can find the inverse of any function by switching the f(x) value and the x value. Then solve for the new f(x) value. The result will be your inverse function. Below is the step-by-step process for solving this one.

f(x) = 2x + 1 ---> Switch the f(x) and x values

x = 2f(x) + 1 ---> Subtract 1 from both sides

x - 1 = 2f(x) ----> Divide each side by 2.

$\frac{x - 1}{2}$ = f(x) ---> Switch the order so that it looks like a function.

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

And that would be your inverse function.

8 0

3 years ago

Can someone pls help me <br> Solve for x <br> Please show ur work

Kitty [74]

Answer:

9=x

Step-by-step explanation:

80º=(8x+8)º

80=8x+8

Subtract 8 from both sides of the equation.

72=8x

Divide 8 from both sides of the equation.

9=x

Hope this helps :)

4 0

3 years ago

Which equation represents the relationship between x and y?

Vedmedyk [2.9K]

Answer:

y=x +3

Step-by-step explanation:

this is the equation because it shows the actual relationship between x and y

6 0

3 years ago