Okay, first of all, you are probably stuck and don't understand what an exterior angle is. I don't know how to explain it but the exterior angle in this case is ∠DAB.

<h2>∠DAB = ∠ABC + ∠BCA</h2><h2> = 90° + 62°</h2><h2>= 152°</h2><h2 /><h2>They said that the exterior angle was instead 128 degrees. This means that now the sum of the angles of B and C are 152 degrees, or, 152 - 128 = 34 degrees greater.</h2>

8 0

4 years ago

A single gram of a certain metallic substance has 0.52 gram of copper and 0.26 gram of zinc. The remaining portion of the substa

blagie [28]

First off all, if we have 1 gram of a substance that has 0.52 gram of copper and 0.26 gram of zinc, the remainder will be: $1gram-(0.52gram+0.26gram)=1gram-0.78gram=0.22gram$
Since we know that t<span>he remaining portion of the substance is nickel, we have 0.22 gram of nickel.

Now, Ben estimates that 1 gram of the substance has 0.2 gram of nickel. To find how many grams of nickel are in 35 grams of the substance, we are going to multiply the grams of the substance by the gram of nickel:
</span> $(35)(0.2)=7$
We can conclude that according to Ben, 35 grams of the substance has 7 grams of nickel.

But we know that in 1 gram of the substance are not 0.2 gram of nickel but 0.22. So lets multiply the grams of the substance by 0.22 to find the actual grams of nickel in it:
$(35)(0.22)=7.7$
We can conclude that 35 grams of the substance has 7.7 grams of nickel.

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5 0

3 years ago

Answer this plz I need help

tamaranim1 [39]

Answer:

186 degrees

104 plus 70 equals 174

360 minus 17 equals 186

5 0

4 years ago

Solve the inequality 16 – 7a ≥ –33.

Arada [10]

Answer:

d???

Step-by-step explanation:

16-7a=-33

-16 | -16

____________

-7a/-7a| -49/-7a

a=7

16- (7•7)= 33

8 0

3 years ago