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3 years ago

Evaluate a + 4 a+4a, plus, 4 when a = 7 a=7a, equals, 7.

Mathematics

1 answer:

Scilla [17]3 years ago

4 0

<em>When evaluating $a=7$ then we get that the expression is 11</em>

<h2>Explanation:</h2>

As I understand the expression is the following:

$a+4$

Let's call, that expression as $E$

So we are asked to find the value of the expression when $a=7$ . In other words, we need to substitute $a=7$ , so:

$E(7)=(7)+4 \\ \\ E(7)=11$

So <em>when evaluating $a=7$ then we get that the expression is 11</em>

<h2>Learn more:</h2>

Distributive property: brainly.com/question/10794694

#LarnWithBrainly

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Can someone help me solve this?

Wittaler [7]

Answer:

∠ ABC = 22°

Step-by-step explanation:

OA = OB ( radii of circle )

Then Δ OAB is isosceles with base angles congruent , that is

∠ OBA = ∠ OAB = 17x

The sum of the 3 angles in the triangle sum to 180°

17x + 17x + 11x = 180

45x = 180 ( divide both sides by 45 )

x = 4

Then

∠ OBA = 17x = 17(4) = 68°

BC is a tangent so ∠ OBC = 90°

∠ ABC = 90° - ∠ OBA = 90° - 68° = 22°

7 0

2 years ago

A circle has a radius of 12cm. What is the area of that circle? Round to the nearest tenth. ( A = nr withe the 2 on top of the r

sergejj [24]

Area=Pi r squared Pi*12*12 452.39cubic cm To the nearest tenth =452.4cubic cm

3 0

3 years ago

Which of the following angles is NOT congruent to 6?<br> 3<br> 2<br> 7<br> 1

TiliK225 [7]

Answer:

Step-by-step explanation:

We can see that 7 is equal to 6, as opposite angles are the same.

We can also see that 2 is also 6, as corresponding angles are equivalent.

Therefore, 3 is also congruent to 6, as it is equal to 2.

Hope that this helps!

8 0

3 years ago

A car is traveling at a speed of 30 miles per hour. what is the car's speed in miles per minute? how many miles will the car tra

Aleksandr-060686 [28]

30 divided by 60 is 1/2
1/2 miles per minute

10 x 1/2 = 5
5 miles in 10 minutes

Hope this helped

5 0

3 years ago

Select the postulate or theorem that you can use to conclude that the triangles are similar.

insens350 [35]

Answer: SAS similarity postulate

Step-by-step explanation:

According to SAS postulate of similarity, two triangles are called similar if two sides in one triangle are in the same proportion to the corresponding sides in the other, and the included angle are congruent.

In triangles, QNR and MNP,

$\frac{QN}{MN} = \frac{QM+MN}{MN} = \frac{10+8}{8} = \frac{18}{8} = \frac{9}{4}$

$\frac{NR}{NP} = \frac{NP+NR}{NP} = \frac{10+8}{8} = \frac{18}{8} = \frac{9}{4}$

$\implies \frac{QN}{MN} = \frac{NR}{NP}$

Also,

$\angle QNR\cong \angle MNP$ (Reflexive)

Thus, By SAS similarity postulate,

$\triangle QNR\sim\triangle MNP$

⇒ Option first is correct.

8 0

3 years ago