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3 years ago

Can someone plz help me

Mathematics

1 answer:

AfilCa [17]3 years ago

5 0

Answer: 5a + 2b

Step-by-step explanation:

She purchased 12a pounds of apples and she used 7a pounds, so that means 12a - 7a = 5a

She purchased 4b pounds of bananas and used 2b pounds, so that means 4b - 2b = 2b

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If x^2+2=3^2/3+3^-2/3 then prove that 3x^3+9x-8=0

gregori [183]

Answer:

See below.

Step-by-step explanation:

x^2 + 2 = 3^2/3 + 3^-2/3

x^2 = 3^2/3 + 3^-2/3 - 2

x = √(3^2/3 + 3^-2/3 - 2)

x = 0.748888296

Substitute for x in 3x^3 + 9x - 8:

3( 0.748888296)^3 + 9( 0.748888296) - 8 = 0.

So it is proved.

6 0

3 years ago

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WILL GIVE BRAINLY IF QUICK. 40 POINTS!!!!

sdas [7]

Answer:

x = $\sqrt{1}$

Step-by-step explanation:

(x + 6 )^2 = 49

get rid of the square , by square rooting the 49

x + 6 = $\sqrt{49}$

x = $\sqrt{49}$ -6

x = $\sqrt{1}$

$\sqrt{49}$ means + or - hence it could be -7 -6 = -1 ... or 7-6 = 1

therefore the answer is = or - 1

hence in terms of roots .. answer is :

$\sqrt{1}$

3 0

3 years ago

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Megan bought a box of 30 cookies. She ate 1/3 of

nevsk [136]

She ate 10 cookies

1/3 of 30 is 10

6 0

3 years ago

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Si 9/11, 5/m+3, 15/N-7, 18/p-1 son fracciones homogeneas como calculo m+n+p

notsponge [240]

I’m confused, can you explain

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3 years ago

Triangles O N M and S R Q are shown. Angles O N M and S R Q are congruent. The length of side N M is 10 and the length of side S

valina [46]

Answer:

Option C.

Step-by-step explanation:

In △ONM and △SRQ,

$\angle ONM\cong \angle SRQ$

$NM=10$

$SR=20$

$NO=8$

$QR=x$

We need to find the value of x that will make △ONM similar to △SRQ by the SAS similarity theorem.

According to SAS similarity theorem, two triangle are similar if two corresponding sides in both triangles are proportional and the included angle in both are congruent.

It is given that $\angle ONM\cong \angle SRQ$ . So, both triangles are similar by SAS if

$\dfrac{NO}{NM}=\dfrac{SR}{QR}$

Substitute the given values.

$\dfrac{8}{10}=\dfrac{20}{x}$

$8\times x=20\times 10$

$8x=200$

Divide both sides by 8.

$x=\dfrac{200}{8}$

$x=25$

Therefore, the correct option is C.

7 0

3 years ago

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