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Kazeer [188]
4 years ago
5

Help me with the question in the pic please and thank u!

Mathematics
1 answer:
Zepler [3.9K]4 years ago
7 0

Answer:

1.98

Step-by-step explanation:

In this problem, we are:

Given: ∠D = 26°, Hypotenuse (DF) = 4.5

To solve: EF

Now through the given, we are to focus on point D to solve for EF.

We need to find the relationship of point D to DF and EF.

The relationship here is sine.

Reason: \frac{opposite}{hypotenuse}

Through point D, DF is the hypotenuse and EF is the opposite side.

So let's solve this simply through algebra,

sin = \frac{opposite}{hypotenuse}

sin(26°) = \frac{EF}{4.5}

0.44 = \frac{EF}{4.5}

0.44 × 4.5 = EF

1.98 = EF

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I will give brainliest if correct
m_a_m_a [10]

Answer:

The surface area of the net shown is: 88 in^2

Step-by-step explanation:

Break up the different shapes in the net:

Let's take the big square first:

It has a side of 5in and a base of 4in.

We multiply both these values to get 20in^2

Lets look at the small rectangular box now:

It has a side of 3in and a base of 4in.

We multiply both these values to get 12in^2

There are two big squares so we add up their surface areas:

20in^2 + 20in^2 = 40in^2

There are 4 small rectangular squares so we add up their surface areas:

12in^2 + 12in^2 + 12in^2 + 12in^2 = 48in^2

Now we add up the big square and small rectangular squares values:

40in^2 + 48in^2 = 88in^2

Therefore the answer is 88in^2

4 0
3 years ago
Solve the system of equations.
morpeh [17]

Answer:

y=3,x=1.3,z=6.2 :)

Step-by-step explanation:

y=3,x=1.3,z=6.2 :)

So, we have:

   : x+y+z=10 [equation 1]

   : 5x+3y=14  [equation 2]

   : x−2y+z=2.5 [equation3]

(I'm going to assume that you know how to solve equations with 2 variables)

1. eliminate a variable to get 2 variables

Let's reverse equation 2:

-x+2y-z= -2.5

and take equation 1, to try to eliminate "z"

x+y+z=10

add up the 2 equations to get:

3y=7.5

and solve to get

y=2.5

2. substitute what we already solved into another equation

Luckily, equation 2 only has 2 variables, and one is y, so we can sub it in.

5x+3y=14 --> 3x+3(7.5)=14

solve to get

x=1.3

3. Substitute both of our variables in to get the final variable: z

Let's take the first equation.

x+y+z=10 --> 1.3+2.5+z=10

solve to get

z=6.2

I hope this helps you!

3 0
3 years ago
85% of what number equals 17
IrinaK [193]
Percent means parts out of 100
85%=85/100=0.85
'of' means multiply

therefor
85% of x equals 17 means
0.85 times x=17
divide both sides by 0.85
x=20



the number is 20
8 0
4 years ago
How to solve this problem​
alina1380 [7]
Why is there a 8 in the corner
3 0
3 years ago
change each mixed number into an equal impropr fraction. a. 1 7/16 b. 11 5/9 c. 30 5/7 d. 10 10/13 e. 24 3/5 f. 129 1/2
tangare [24]
A. 33/16
B. 104/9
C. 215/7
D. 140/13
E. 123/5
F. 259/2

3 0
4 years ago
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