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4 years ago

Which is the correct first step for solving this equation? 2x-7=5?

Mathematics

1 answer:

scZoUnD [109]4 years ago

4 0

Answer:

to get x by itself so divide 5 by 2 and then add 7 to the other side

Step-by-step explanation:

2x-7=5

x-7=2.5

x=2.5+7

x=9.5

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Can you use the SSS Postulate or the SAS Postulate to prove fez = fgz

GREYUIT [131]

From the shown figure we have:
1) FE = FG ⇒⇒⇒ given
2) ∠EFZ = ∠GFZ ⇒⇒⇒ given
3) FZ = FZ ⇒⇒⇒ Reflexive Property

∴ The triangles are congruent by SAS

The correct choice is: 
by SAS only

6 0

4 years ago

Read 2 more answers

Find the area in cm2 of a rhombus whose side length is 29 cm and

kotegsom [21]

$\left(\frac{d}{2}\right)^2+\left(\frac{d+2}{2}\right)^2=29^2\\\\\frac{d^2}{4}+\frac{d^2+4d+4}{4}=841\ \ \ \ /\cdot4\\\\d^2+d^2+4d+4=3364\\\\2d^2+4d+4-3364=0\\\\2d^2+4d-3360=0\ \ \ \ /:2\\\\d^2+2d-1680=0$

$a=1;\ b=2;\ c=-1680\\\\\Delta=b^2-4ac\to\Delta=2^2-4\cdot1\cdot(-1680)=4+6720=6724\\\\\sqrt\Delta=\sqrt{6724}=82\\\\d_1=\frac{-b-\sqrt\Delta}{2a}\to d_1=\frac{-2-82}{2\cdot1} < 0\\\\d_2=\frac{-b+\sqrt\Delta}{2a}\to d_2=\frac{-2+82}{2\cdot1}=\frac{80}{2}=40\ (cm)\\\\d=40cm;\ d+2=42cm\\\\A_r=\frac{d(d+2)}{2}\to A_r=\frac{40\cdot42}{2}=840\ (cm^2)$

3 0

4 years ago

Help is it A or B? pls help

Damm [24]

Answer:

$f(x)=-(x+8)(x-2)$

Step-by-step explanation:

Start by factoring out a -1...

$f(x)=-(x^2+6x-16)$

Now, we have to find two integers that multiply to get -16 and have a sum of 6:

(-2)*8=-16

-2+8=8-2=6

Using this, we can split 6x into -2x and 8x...

$f(x)=-(x^2-2x+8x+16)$

Factor the first and second half separately...

$f(x)=-[(x^2-2x)+(8x-16)]\\f(x)=-[x(x-2)+8(x-2)]\\$

Since both x and 8 are being multiplied by x-2, we can combine them to get...

$f(x)=-(x+8)(x-2)$

5 0

3 years ago

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lana66690 [7]

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Step-by-step explanation:

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3 years ago

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Karo-lina-s [1.5K]

Answer:

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10,20,30,40,50,60

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Step-by-step explanation:

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3 years ago