3 years ago

Which expression is equivalent to: 7a + 5 (Give an explanation)

Mathematics

1 answer:

sveticcg [70]3 years ago

7 0

D is the answer I believe

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This is pretty easy :0

maksim [4K]

Answer:

1, 1.5, -1 1/5

Step-by-step explanation:

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2 years ago

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Only using 2,3,5,8 once to get 104 as many times as possible

Arte-miy333 [17]

8x(5x2+3)=8x(15+3)=8x13=104

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2 years ago

What is the solution to this inequality?

Alika [10]

Answer:

Step-by-step explanation:

<em><u>e5uiitweyutwwsuoye34t</u></em>

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2 years ago

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Please help me with algebra part B and C. attachment below. Will mark as brainslist. 25 points.

miv72 [106K]

Answer:

C. $(-7x+60)(x+4)$

Step-by-step explanation:

Consider the expression $-7x^2+32x+240.$

First, note that

$a=-7\\ \\b=32\\ \\c=240$

Find the discriminant

$D=b^2-4ac=32^2-4\cdot (-7)\cdot 240=1,024+6,720=7,744\\ \\\sqrt{D}=\sqrt{7,744}=88$

Now,

$x_1=\dfrac{-b+\sqrt{D}}{2a}=\dfrac{-32+88}{2\cdot (-7)}=-4\\ \\x_2=\dfrac{-b-\sqrt{D}}{2a}=\dfrac{-32-88}{2\cdot (-7)}=\dfrac{60}{7}$

Write the factored form:

$-7x^2+32x+240=-7(x-(-4))\left(x-\dfrac{60}{7}\right)=(x+4)(-7x+60)$

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2 years ago

Which expression is equivalent to3 (1 + x)+7

ivann1987 [24]

Expressions equivalent to 3(1+x)+7 is x+10

6 0

3 years ago