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3 years ago

Evaluate 7+5^2*4 Algebra 1

Mathematics

2 answers:

vagabundo [1.1K]3 years ago

8 0

Hi there!

Answer:

=107

*The answer must have a positive sign.*

Step-by-step explanation:

<h2>Lesson: Order of operations</h2>

Parenthesis

Exponents

Multiply

Divide

Add

Subtract

It can also go left to right.

First, you do exponents.

$5^2=5*5=25$

$7+25*4$

Then, you multiply from left to right.

$25*4=100$

Finally, you add from left to right.

$100+7=107$

I hope this helps you!

Have a nice day! :)

-Charlie

Keith_Richards [23]3 years ago

3 0

I also got 107 remember order of operations (parentheses, exponents, multiply, division. Addition. Subtract) or please excuse my dear aunt sally is how I remember it

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Jessie estimates the weight of her cat to be 10 pounds. The actual weight of the cat is 13.75 pounds. find the percent error.

romanna [79]

Answer:

$\large \boxed{27 \, \%} }$

Step-by-step explanation:

$\begin{array}{rcl}\text{Percent error}&= &\dfrac{\lvert \text{Measured - Actual}\lvert}{ \text{Actual}} \times100 \,\%\\\\& = & \dfrac{\lvert 10 - 13.75\lvert}{13.75} \times 100 \, \% \\\\& = & \dfrac{\lvert -3.75\lvert}{13.75} \times 100 \, \%\\ \\& = & \dfrac{3.75}{13.75} \times 100 \,\%\\\\& = & 0.27 \times 100 \, \%\\& = & \mathbf{27 \, \%}\\\end{array}\\\text{The percent error is $\large \boxed{\mathbf{27 \, \%} }$}$

3 0

3 years ago

Please help me solve this I am stuck I will mark brainliest

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Step-by-step explanation:

6 0

3 years ago

Find the area of the composite figure.

Minchanka [31]

Answer:

132 square feet

Step-by-step explanation:

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2 years ago

Factor b2 + b – 6.

Ulleksa [173]

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3 years ago

MN is a diameter of a circle with centre ' O ' . If BD = CD , prove that ∠OAD = ∠OCD

Varvara68 [4.7K]

Answer:

$\sf \: Proved \: \angle \: OAD \: = \angle \: OCD$

Step-by-step explanation:

Given:

Mn is diameter of circle having centre O

and BD = OD,

To prove that:

 $\angle \: OAD \: = \angle \: OCD$ 

Solution:

Join the points O and B and draw OB,

On joining the line,

in ∆OCD and ∆OBD,

OC =OB → (Radius of same circle)

BD =CD → (from given)

OD =OD → (Common side in both the triangles)

Hence ∆OCD and ∆OBD are congruent from SSS property.

so we can say that,

$\angle \: OBD \: = \angle \: OCD$

Consider above prove as statement A

Corresponding angles of congruent traingle.

in ∆ OAB,

OA = OB (radius of same circle)

hence ∆OAB is an isosceles traingle.

We know that opposite angle of isosceles traingle are always equal. hence,

$\angle \: OBD \: = \angle \: OAB \\ \angle \: OAB \: = \angle \: OAD (same \: angles) \\ \angle \: OBD \: = \angle \: OAD$

Consider above prove as statement B

From Statement A & B we can say that

$\angle \: OAD \: = \angle \: OCD$

Thanks for joining brainly community!

5 0

2 years ago