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2 years ago

7 + 4 + -8 + -7 + -5 + 2=? Is the answer -7?

Mathematics

2 answers:

balandron [24]2 years ago

4 0

Answer:

Yes

Step-by-step explanation:

Alisiya [41]2 years ago

3 0

Yes, the answer is -7.

7 + 4 + -8 + -7 + -5 + 2 =

= 7 - 7 + 4 + -8 + -5 + 2 =

= 4 + -8 + -5 + 2 =

= -4 + -5 + 2 =

= -9 + 2 =

= -7

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Which of the following is true regarding the solution to the logarithmic equation below? log Subscript 2 Baseline (x + 11) = 4.

meriva

Answer:

Option C.

Step-by-step explanation:

The given logarithmic equation is

$\log_2(x+11)=4$

It can be written as

$(x+11)=2^4$ $[\because log_ax=y\Leftrightarrow x=a^y]$

$x+11=16$

$x=5$

Now, to check whether $x=5$ is a true solution or not. Substitute $x=5$ in the LHS of given equation.

$LHS=\log_2(5+11)$

$LHS=\log_2(16)$

$LHS=\log_22^4$

$LHS=4$ $[\because log_aa^x=x]$

$LHS=RHS$

Hence, $x=5$ is a true solution because $\log_2(16)=4$ .

Therefore, the correct option is C.

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2 years ago

Please need help in these 3 algebra questions !!!!

Marysya12 [62]

Answer:

$\large\boxed{7.\ B.\ 8s^2+16s+1}\\\\\boxed{8.\ D.\ -15t^9u^{11}}\\\\\boxed{11.\ C.\ 3,\ -2}$

Step-by-step explanation:

$7.\\(3s^2+7s+2)+(5s^2+9s-1)=3s^2+7s+2+5s^2+9s-1\\\\\text{combine like terms}\\\\=(3s^2+5s^2)+(7s+9s)+(2-1)\\\\=8s^2+16s+1$

$8.\\(-3t^2u^3)(5t^7u^8)=(-3\cdot5)(t^2t^7)(u^3u^8)\qquad\text{use}\ a^na^m=a^{n+m}\\\\=-15t^{2+7}u^{3+8}=-15t^9u^{11}$

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3 years ago

Item 20 An online T-shirt store is having a sale. The original price of each T-shirt is p dollars. The store sells 20 T-shirts a

Bumek [7]

discount per tshirt=(originalprice-discountedprice)/numberofshirtssold

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3 years ago

Read 2 more answers

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Answer:

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Step-by-step explanation:

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3 years ago

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zlopas [31]

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In this question,

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Number of ways people can get off the elevator can be calculated as

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