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Vedmedyk [2.9K]
3 years ago
7

ass="latex-formula">
Mathematics
1 answer:
Goshia [24]3 years ago
7 0

Answer:

<h2>-1</h2>

Step-by-step explanation:

2x + 7  - 1 = 2x + 7

=  > 2x - 1 = 2x  + 7 - 7

=  > 2x - 1 = 2x

=  >  - 1 = 2x - 2x

=  > x =  - 1

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Plz help! will give brainliest!!!
vesna_86 [32]

Answer:

1.42 x 105

Step-by-step explanation:

3 0
3 years ago
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Need Help Please I'm Out Of Time ;(
vodka [1.7K]

Answer:

Total surface area = 184.86 cm²

Step-by-step explanation:

If we see the the diagram, we can find that the net of this triangular prism includes:

2 triangles each with the dimension of one side 4.3cm, second side 5.2cm and third side 6.75 cm

3 rectangles each with the dimensions of (6.75×10)cm, (5.2×10)cm and (4.3×10)cm

Surface area of triangle with a,b and c side:

s=(a+b+c)/2

Area= √s(s−a)(s−b)(s−c)

Area = 11.18cm²

For 2 triangle:

Area = 22.36cm²

Surface Area of Rectangles:

Area = (6.75×10)cm + (5.2×10)cm + (4.3×10)cm

Area = 162.5 cm²

Total surface area = area of 2 triangle + area of 3 rectangles:

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Total surface area = 184.86 cm²

8 0
3 years ago
Can someone please help me with this multiple choice question?
iVinArrow [24]
1) the small and large triangles are similar, then we can write:

x/24 = 8/18
Cross multiplication → 18x = 24.8 → 18x = 192 and x = 192/18

and x = 32/3 Or 10 ²/³

2) Δ ABC is similar to Δ EDC Since:

∠A = ∠D = 90°

∠C is common 

8 0
3 years ago
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Use the four functions below for this question:
Jlenok [28]

Answer:

We have four functions:

For f(x) we have two points (-2,2) and (-1,-1)

we will use two point form which is:

y-y_1=\frac{y_2-y_1}{x_2-x_1}(x-x_1)

So, on substituting the values we get:

y-2=\frac{-1-2}{-1-(-2)}(x-(-2))

y-2=\frac{-3}{x+2}

y=-3x-4

So, f(x)=-3x-4

We have g(x)=3x-4

Now, we will from h(x) we have two points  let initial point on monday is (0,4) and tuesday (1,1) again use two point form we get:

y-4=-3(x-0)

\Rightarrow y=-3x+4

So, h(x)= -3x+4

Now, we will form j(x) we have three points (2,10) , (-2,6) and (2,22)

We will use (-2,6) and (2,22)  to find the function with two point form.

y-6=\frac{22-6}{2+2}x+2)

\Rightarrow y=4x+14

j(x)= 4x+14

To find the slope we will compare the given function with general equation which is y= mx +c; m is the slope

And to find y-intercept we will put x=0

f(x)=-3x-4

Slope is: -3

And y-intercept is: (0,-4)

g(x)=3x-4

Slope is: 3

And y-intercept is: (0,-4)

h(x)= -3x+4

Slope is: -3

And y-intercept is: (0,4)

j(x)= 4x+14

Slope is: 4

And y-intercept is: (0,14)

8 0
3 years ago
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Which equation could be used to solve the problem? Joan picked 4 bushels of apples in one hour. At that rate, how many bushels w
jeka94
Hello!

Unit rates can be written as ratios. In this case, we have 4 bushels in one hour, or 4:1. In eight hours, we can multiply like a fraction, multiplying both by eight to get eight hours.

Our final answer is B) 8·4.

I hope this helps!
3 0
3 years ago
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